How to convert number to words in java

Question

We currently have a crude mechanism to convert numbers to words  e g  using a few static arrays  and based on the size of the number translating that into an english text  But we are running into issues for numbers which are huge   10183   Ten thousand one hundred eighty three 90   Ninety 5888   Five thousand eight hundred eighty eight   Is there an easy to use function in any of the math libraries which I can use for this purpose

User · Answer

I think that this solution is not the best, since it works only for int, but i think it's great for a beginner.

public class NumberWordConverter {
    public static final String[] units = {
            "", "one", "two", "three", "four", "five", "six", "seven",
            "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
            "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"
    };

    public static final String[] tens = {
            "",        // 0
            "",        // 1
            "twenty",  // 2
            "thirty",  // 3
            "forty",   // 4
            "fifty",   // 5
            "sixty",   // 6
            "seventy", // 7
            "eighty",  // 8
            "ninety"   // 9
    };

    public static String convert(final int n) {
        if (n < 0) {
            return "minus " + convert(-n);
        }

        if (n < 20) {
            return units[n];
        }

        if (n < 100) {
            return tens[n / 10] + ((n % 10 != 0) ? " " : "") + units[n % 10];
        }

        if (n < 1000) {
            return units[n / 100] + " hundred" + ((n % 100 != 0) ? " " : "") + convert(n % 100);
        }

        if (n < 1000000) {
            return convert(n / 1000) + " thousand" + ((n % 1000 != 0) ? " " : "") + convert(n % 1000);
        }

        if (n < 1000000000) {
            return convert(n / 1000000) + " million" + ((n % 1000000 != 0) ? " " : "") + convert(n % 1000000);
        }

        return convert(n / 1000000000) + " billion"  + ((n % 1000000000 != 0) ? " " : "") + convert(n % 1000000000);
    }

    public static void main(final String[] args) {
        final Random generator = new Random();

        int n;
        for (int i = 0; i < 20; i++) {
            n = generator.nextInt(Integer.MAX_VALUE);

            System.out.printf("%10d = '%s'%n", n, convert(n));
        }

        n = 1000;
        System.out.printf("%10d = '%s'%n", n, convert(n));

        n = 2000;
        System.out.printf("%10d = '%s'%n", n, convert(n));

        n = 10000;
        System.out.printf("%10d = '%s'%n", n, convert(n));

        n = 11000;
        System.out.printf("%10d = '%s'%n", n, convert(n));

        n = 999999999;
        System.out.printf("%10d = '%s'%n", n, convert(n));

        n = Integer.MAX_VALUE;
        System.out.printf("%10d = '%s'%n", n, convert(n));
    }
}

The test creates 20 random numbers up to Integer.MAX_VALUE and than some that know to be problematic, because of 0, 10, etc.. Output:

   5599908 = 'five million five hundred ninety nine thousand nine hundred eight'
 192603486 = 'one hundred ninety two million six hundred three thousand four hundred eighty six'
1392431868 = 'one billion three hundred ninety two million four hundred thirty one thousand eight hundred sixty eight'
1023787010 = 'one billion twenty three million seven hundred eighty seven thousand ten'
1364396236 = 'one billion three hundred sixty four million three hundred ninety six thousand two hundred thirty six'
1511255671 = 'one billion five hundred eleven million two hundred fifty five thousand six hundred seventy one'
 225955221 = 'two hundred twenty five million nine hundred fifty five thousand two hundred twenty one'
1890141052 = 'one billion eight hundred ninety million one hundred forty one thousand fifty two'
 261839422 = 'two hundred sixty one million eight hundred thirty nine thousand four hundred twenty two'
 728428650 = 'seven hundred twenty eight million four hundred twenty eight thousand six hundred fifty'
 860607319 = 'eight hundred sixty million six hundred seven thousand three hundred nineteen'
 719753587 = 'seven hundred nineteen million seven hundred fifty three thousand five hundred eighty seven'
2063829124 = 'two billion sixty three million eight hundred twenty nine thousand one hundred twenty four'
1081010996 = 'one billion eighty one million ten thousand nine hundred ninety six'
 999215799 = 'nine hundred ninety nine million two hundred fifteen thousand seven hundred ninety nine'
2105226236 = 'two billion one hundred five million two hundred twenty six thousand two hundred thirty six'
1431882940 = 'one billion four hundred thirty one million eight hundred eighty two thousand nine hundred forty'
1991707241 = 'one billion nine hundred ninety one million seven hundred seven thousand two hundred forty one'
1088301563 = 'one billion eighty eight million three hundred one thousand five hundred sixty three'
 964601609 = 'nine hundred sixty four million six hundred one thousand six hundred nine'
      1000 = 'one thousand'
      2000 = 'two thousand'
     10000 = 'ten thousand'
     11000 = 'eleven thousand'
 999999999 = 'nine hundred ninety nine million nine hundred ninety nine thousand nine hundred ninety nine'
2147483647 = 'two billion one hundred forty seven million four hundred eighty three thousand six hundred forty seven'

Hope it helps :)

User · Answer

import java util     public class NumberToWord       public void numberToword int n  String ch            String one             one     two     three     four     five     six     seven     eight     Nine     ten     eleven     twelve     thirteen     fourteen    fifteen     sixteen     seventeen     eighteen     nineteen                     String ten                  twenty     thirty     forty     fifty     sixty    seventy     eighty     ninety            if  n  gt  19                System out print ten n   10          one n   10              else               System out print one n                      if  n  gt  0                System out print ch                       public static void main String   args            int n   0          Scanner s   new Scanner System in           System out print  Enter an integer number              n   s nextInt            if  n  lt   0                System out print  Enter numbers greater than 0              else               NumberToWord a   new NumberToWord                System out print  After conversion number in words is                  a numberToword  n   1000000000     Hundred                a numberToword  n   10000000    100    crore                a numberToword   n   100000    100     lakh                a numberToword   n   1000    100     thousand                a numberToword   n   100    10     hundred                a numberToword  n   100

User · Answer

This Program will display the given number in words from 0 to 999999999   author Manoj Kumar Dunna  Mail Id   manojdunna gmail com          import java util Scanner   class NumberToString        public enum hundreds  OneHundred  TwoHundred  ThreeHundred  FourHundred  FiveHundred  SixHundred  SevenHundred  EightHundred  NineHundred      public enum tens  Twenty  Thirty  Forty  Fifty  Sixty  Seventy  Eighty  Ninety      public enum ones  One  Two  Three  Four  Five  Six  Seven  Eight  Nine      public enum denom  Thousand  Lakhs  Crores      public enum splNums   Ten  Eleven  Twelve  Thirteen  Fourteen  Fifteen  Sixteen  Seventeen  Eighteen  Nineteen      public static String text            public static void main String   args                 System out println  Enter Number to convert into words            Scanner sc   new Scanner System in           long num   sc nextInt            int rem   0          int i   0          while num  gt  0                        if i    0                   rem    int   num   1000                   printText rem                   num   num   1000                  i                              else if num  gt  0                                rem    int   num   100                   if rem  gt  0                      text   denom values   i - 1         text                  printText rem                   num   num   100                  i                                    if i  gt  0              System out println text           else             System out println  Zero               public static void printText int num                if   num  gt  9  amp  amp  num  lt  19                         if num   10  gt  0                  getOnes num   10                num   num   10              if num   10  gt  0                  getTens num   10                num   num   10              if num  gt  0                  getHundreds num                     else                       getSplNums num   10                        public static void getSplNums int num                text   splNums values   num         text             public static void getHundreds int num                text   hundreds values   num - 1         text             public static void getTens int num                text   tens values   num - 2         text             public static void getOnes int num                text   ones values   num - 1         text

User · Answer

Intuitive solution 1  Build a sorted matrix of  value - word  type 2  Find the closest value from matrix for which n value  gt  0  can use binary search  3  Recursively build the left and the right part of the number  Your answer is left part   word   right part class Solution       private final Object     pairs                  1000 000 000   quot Billion quot     100 00 00   quot Million quot     1000   quot Thousand quot     100   quot Hundred quot                 90   quot Ninety quot     80   quot Eighty quot     70   quot Seventy quot     60   quot Sixty quot                 50   quot Fifty quot     40   quot Forty quot     30   quot Thirty quot     20   quot Twenty quot                 19   quot Nineteen quot     18   quot Eighteen quot     17   quot Seventeen quot     16   quot Sixteen quot                 15   quot Fifteen quot     14   quot Fourteen quot     13   quot Thirteen quot     12   quot Twelve quot                 11   quot Eleven quot     10   quot Ten quot     9   quot Nine quot     8   quot Eight quot                 7   quot Seven quot     6   quot Six quot     5   quot Five quot     4   quot Four quot                 3   quot Three quot     2   quot Two quot     1   quot One quot               private Object   getPair int num            int n   pairs length          int l   0  r   n - 1          int result   -1          while  l  lt   r                int mid    l   r   gt  gt  gt  1              int value    Integer  pairs mid  0               if  value    num                    return pairs mid                             else if  num   value  gt  0                    result   mid                  r   mid - 1                            else                   l   mid   1                                  return pairs result              public String numberToWords int num            if  num    0                return  quot Zero quot                     var pair   getPair num           String word    String  pair 1           int value    Integer  pair 0           var left   num  gt   100   numberToWords num   value     quot   quot     quot  quot           var right   num   value    0    quot  quot     quot   quot    numberToWords num   value           return left   word   right

User · Answer

I implemented it like this  package com stack overflow number in english   import java util ResourceBundle   public class ActualImplementation        public static ResourceBundle readPropertyFile   ResourceBundle              getBundle  NumberEnglishRepresentation         public static void main String   args            System out println ActualImplementation main -2               public static String main Integer number            int power             Calculate Number of digits          Integer numberOfDigits   number  gt  0    int  Math log10  double  number    1                   1          String output                  If number is negative convert it to positive an append minus to            output         if  Integer signum number     -1                output    minus                number   number  lt  0   number   -1   number                    String stringVal   String valueOf number            if  number  lt   20    number    30    number    40    number    50                    number    60    number    70    number    80    number    90                    number    100    number    1000              output    readPropertyFile getString stringVal            else               int i              for  i   0  i  lt  numberOfDigits  i                       if  number    0                         numberOfDigits   number  gt  0    int  Math                              log10  double  number    1   1                       power    int  Math pow 10  numberOfDigits - 1                          If number is like 10 001 then print ten first and then                        remaining value                     if  numberOfDigits  gt   5  amp  amp  numberOfDigits   2    1                            power    int  Math pow 10  numberOfDigits - 2                                              if  readPropertyFile containsKey String valueOf number                            output    readPropertyFile getString String                                  valueOf number                        else                              As the digits at units and tens place are read                            differently                         if  numberOfDigits  gt  2                                 output    readPropertyFile getString String                                      valueOf number   power                                         readPropertyFile getString String                                              valueOf power                              else                               output    readPropertyFile getString String                                      valueOf number - number   power                                                                         number    int   number   power                                                       return output            and the resource file is    0 zero 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten    11 eleven 12 twelve 13 thirteen 14 fourteen 15fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 twenty  30 thirty 40 fourty 50 fifty 60 sixty 70 seventy 80 eighty 90 ninety  100 hundred 1000 thousand 100000 Lakh   This one is implemented till 10 lakhs only

User · Answer

You can use ICU4J  Just need to add POM entry and code is below for any Number  Country and Language   POM Entry        lt dependency gt           lt groupId gt com ibm icu lt  groupId gt           lt artifactId gt icu4j lt  artifactId gt           lt version gt 64 2 lt  version gt       lt  dependency gt    Code is  public class TranslateNumberToWord           Translate         param ctryCd     param lang     param reqStr     param fractionUnitName     return     public static String translate String ctryCd  String lang  String reqStr  String fractionUnitName        StringBuffer result   new StringBuffer         Locale locale   new Locale lang  ctryCd       Currency crncy   Currency getInstance locale        String inputArr     StringUtils split new BigDecimal reqStr  abs   toPlainString              RuleBasedNumberFormat rule   new RuleBasedNumberFormat locale  RuleBasedNumberFormat SPELLOUT        int i   0      for  String input   inputArr            CurrencyAmount crncyAmt   new CurrencyAmount new BigDecimal input   crncy           if  i      0                result append rule format crncyAmt   append       crncy getDisplayName       and               else               result append rule format crncyAmt   append       fractionUnitName                             return result toString       public static void main String   args        String ctryCd    US       String lang    en       String input    95 17        String result   translate ctryCd  lang  input   Cents        System out println  Input      input     result      result        Tested with quite a big number and output would be  Input  95 17 result  ninety-five US Dollar and seventeen Cents Input  999999999999999999 99 result  nine hundred ninety-nine quadrillion nine hundred ninety-nine trillion nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine US Dollar and ninety-nine Cents

User · Answer

import java util Scanner   public class StringToNum   public static void main String args            Scanner sc new Scanner System in       System out println  Enter the no          int  no sc nextInt        int arrNum   new int 10       int i 0      while no  0              arrNum i  no 10        no no 10        i              int len i      int arrNum1   new int len       int j 0      for int k len-1 k gt  0 k--                arrNum1 j  arrNum k           j              StringToNum stn new StringToNum        String output         switch len              case 1                   output  stn strNum1 arrNum1 len-1             System out println  output   output            break                case 2                  int no1 arrNum1 len-2  10 arrNum1 len-1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1              output output     stn strNum1 arrNum1 len-1             System out println  output   output                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1             System out println  output   output                      break                case 3                  output stn strNum1 arrNum1 len-3     hundred            int no1 arrNum1 len-2  10 arrNum1 len-1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1                      System out println  output   output             break                case 4                  output stn strNum1 arrNum1 len-4     thousand            if  stn strNum1 arrNum1 len - 3   equals                        output  stn strNum1 arrNum1 len-3     hundred                      int no1 arrNum1 len-2  10 arrNum1 len-1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1                      System out println  output   output           break                 case 5                  int no1 arrNum1 len-5  10 arrNum1 len-4           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1    thousand                      else                    arrNum1 len-5  arrNum1 len-5  10           output  stn strNum2 arrNum1 len-5             output output     stn strNum1 arrNum1 len-4     thousand                      if   stn strNum1 arrNum1 len - 3   equals                        output  stn strNum1 arrNum1 len-3     hundred                      no1   arrNum1 len - 2    10   arrNum1 len - 1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1                      System out println  output   output           break                case 6                  output  stn strNum1 arrNum1 len-6     million            int no1 arrNum1 len-5  10 arrNum1 len-4           if no1 gt  11  amp  no1 lt  19                     output  stn strNum2 no1    thousand                      else                    arrNum1 len-5  arrNum1 len-5  10           output  stn strNum2 arrNum1 len-5             output output     stn strNum1 arrNum1 len-4     thousand                      if   stn strNum1 arrNum1 len - 3   equals                        output  stn strNum1 arrNum1 len-3     hundred                      no1   arrNum1 len - 2    10   arrNum1 len - 1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1                      System out println  output   output           break                case 7                  int no1 arrNum1 len-7  10 arrNum1 len-6           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1    Milloin                      else                    arrNum1 len-7  arrNum1 len-7  10           output  stn strNum2 arrNum1 len-7             output output     stn strNum1 arrNum1 len-6     Million                      no1 arrNum1 len-5  10 arrNum1 len-4           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1    Thousand                      else                    arrNum1 len-5  arrNum1 len-5  10           output  stn strNum2 arrNum1 len-5             output output     stn strNum1 arrNum1 len-4     Thousand                      if   stn strNum1 arrNum1 len - 3   equals                        output  stn strNum1 arrNum1 len-3     Hundred                      no1   arrNum1 len - 2    10   arrNum1 len - 1           if no1 gt  11  amp  no1 lt  19                     output stn strNum2 no1                     else                    arrNum1 len-2  arrNum1 len-2  10           output  stn strNum2 arrNum1 len-2             output output     stn strNum1 arrNum1 len-1                      System out println  output   output           break                       String strNum1 int a          String op         switch a             case 1              op  one        break              case 2              op  two        break              case 3              op  three        break              case 4              op  four        break              case 5              op  five        break              case 6              op  six        break              case 7              op  seven        break              case 8              op  eight        break              case 9              op  nine        break                   return op        String strNum2 int a          String op         switch a             case 10              op  ten        break              case 20              op  twenty        break              case 30              op  thirty        break              case 40              op  fourty        break              case 50              op  fifty        break              case 60              op  sixty        break              case 70              op  seventy        break              case 80              op  eighty        break              case 90              op  ninty        break              case 11              op  eleven        break              case 12              op  twelve        break              case 13              op  thirteen        break              case 14              op  fourteen        break              case 15              op  fifteen        break              case 16              op  sixteen        break              case 17              op  seventeen        break              case 18              op  eighteen        break              case 19              op  nineteen        break                   return op

User · Answer

package it tommasoresti facebook   class NumbersToWords        private static final String ZERO    quot zero quot       private static String   oneToNine                  quot one quot    quot two quot    quot three quot    quot four quot    quot five quot    quot six quot    quot seven quot    quot eight quot    quot nine quot              private static String   tenToNinteen                  quot ten quot    quot eleven quot    quot twelve quot    quot thirteen quot    quot fourteen quot    quot fifteen quot    quot sixteen quot    quot seventeen quot    quot eighteen quot    quot nineteen quot              private static String   dozens                  quot ten quot    quot twenty quot    quot thirty quot    quot forty quot    quot fifty quot    quot sixty quot    quot seventy quot    quot eighty quot    quot ninety quot              public static String solution int number            if number    0              return ZERO           return generate number  trim               public static String generate int number            if number  gt   1000000000                return generate number   1000000000     quot  billion  quot    generate number   1000000000                     else if number  gt   1000000                return generate number   1000000     quot  million  quot    generate number   1000000                     else if number  gt   1000                return generate number   1000     quot  thousand  quot    generate number   1000                     else if number  gt   100                return generate number   100     quot  hundred  quot    generate number   100                      return generate1To99 number              private static String generate1To99 int number            if  number    0              return  quot  quot            if  number  lt   9              return oneToNine number - 1           else if  number  lt   19              return tenToNinteen number   10           else               return dozens number   10 - 1     quot   quot    generate1To99 number   10                      Test  Test public void given a complex number   throws Exception       assertThat solution 1234567890           is  quot one billion two hundred thirty four million five hundred sixty seven thousand eight hundred ninety quot

User · Answer

I ve developed a Java component to convert given number into words  All you ve to do is - just copy the whole class from Java program to convert numbers to words and paste it in your project   Just invoke it like below  Words w   Words getInstance 1234567   System out println w getNumberInWords       My program supports up to 10 million  If you want  you can still extend this  Just below the example output  2345223   Twenty Three Lakh Fourty Five Thousand Two Hundred Twenty Three 9999999   Ninety Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine 199   One Hundred Ninety Nine 10   Ten   Thanks  Santhosh

User · Answer

this program will display number in words for eg  if you enter 101 it will show  ONE HUNDRED AND ONE     import java util     public class NumToWords     String string    String st1            one    two    three    four    five    six    seven                       eight    nine        String st2        hundred    thousand    lakh    crore       String st3        ten    eleven    twelve    thirteen    fourteen                       fifteen    sixteen    seventeen    eighteen    ninteen        String st4        twenty    thirty    fourty    fifty    sixty    seventy                       eighty    ninety        public String convert int number        int n   1      int word      string           while  number    0          switch  n            case 1            word   number   100            pass word             if  number  gt  100  amp  amp  number   100    0                show  and                   System out print  ankit                          number    100            break          case 2            word   number   10            if  word    0                show                   show st2 0                show                   pass word                         number    10            break          case 3            word   number   100            if  word    0                show                   show st2 1                show                   pass word                         number    100            break          case 4            word   number   100            if  word    0                show                   show st2 2                show                   pass word                         number    100            break          case 5            word   number   100            if  word    0                show                   show st2 3                show                   pass word                         number    100            break                    n                  return string           public void pass int number        int word  q      if  number  lt  10          show st1 number              if  number  gt  9  amp  amp  number  lt  20          show st3 number - 10              if  number  gt  19          word   number   10        if  word    0            q   number   10          show st4 q - 2            else           q   number   10          show st1 word            show               show st4 q - 2                         public void show String s        String st      st   string      string   s      string    st         public static void main String   args        NumToWords w   new NumToWords        Scanner input   new Scanner System in       System out print  Enter Number          int num   input nextInt        String inwords   w convert num       System out println inwords

User · Answer

The same accepted answer  Jigar Joshi   but now in Spanish  Feel free to change this if you find a mistake  Easier than french  but based on that though      Spanish   import java text     class SpanishNumberToWords     private static final String   tensNames                          veinte        treinta        cuarenta        cincuenta        sesenta        setenta        ochenta        noventa          private static final String   unitNames1                  un        dos        tres        cuatro        cinco        seis        siete        ocho        nueve        diez        once        doce        trece        catorce        quince        dieciseis        diecisiete        dieciocho        diecinueve        veinte        veintiun        veintidos        veintitres        veinticuatro        veinticinco        veintiseis        veintisiete        veintiocho        veintinueve           private static final String   unitNames2                          dosc        tresc        cuatroc        quin        seisc        setec        ochoc        novec        diez          private SpanishNumberToWords         private static String convertZeroToHundred int number         int theTens   number   10      int theUnit   number   10      String result               separator     String theSeparator           if  theTens  gt  1            theSeparator     y                 particular cases     switch  theUnit        case 0          theSeparator             break      default                tens in letters     switch  theTens        case 0          result   unitNames1 theUnit         break      case 1  case 2          result    unitNames1 theTens 10 theUnit           break      default           result   tensNames theTens                                  theSeparator   unitNames1 theUnit             return result         private static String convertLessThanOneThousand int number         int theHundreds   number   100      int leReste   number   100      String sReste   convertZeroToHundred leReste        String result      switch  theHundreds        case 0          result   sReste        break      case 1         if  leReste  gt  0              result    ciento     sReste                else             result    cien                 break      default         if  leReste  gt  0              result   unitNames2 theHundreds     ientos     sReste                else             result   unitNames2 theHundreds     ientos                     return result         public static String convert long number           0    999 999 999 999     if  number    0    return  cero          String snumber   Long toString number           pad des  0      String mask    000000000000       DecimalFormat df   new DecimalFormat mask       snumber   df format number           XXXnnnnnnnnn     int theMilliards   Integer parseInt snumber substring 0 3           nnnXXXnnnnnn     int theMillions    Integer parseInt snumber substring 3 6           nnnnnnXXXnnn     int theCentMiles   Integer parseInt snumber substring 6 9           nnnnnnnnnXXX     int lesMille   Integer parseInt snumber substring 9 12         String tradMilliards      switch  theMilliards        case 0        tradMilliards             break      case 1         tradMilliards   convertLessThanOneThousand theMilliards               mil millones          break      default         tradMilliards   convertLessThanOneThousand theMilliards               mil millones              String resultat    tradMilliards       String tradMillions      switch  theMillions        case 0        tradMillions             break      case 1         tradMillions   convertLessThanOneThousand theMillions               millon          break      default         tradMillions   convertLessThanOneThousand theMillions               millones              resultat    resultat   tradMillions       String tradCentMille      switch  theCentMiles        case 0        tradCentMille             break      case 1         tradCentMille    mil          break      default         tradCentMille   convertLessThanOneThousand theCentMiles               mil              resultat    resultat   tradCentMille       String tradMille      tradMille   convertLessThanOneThousand lesMille       resultat    resultat   tradMille       return resultat         public static void main String   args        System out println          SpanishNumberToWords convert 0        System out println          SpanishNumberToWords convert 1        System out println          SpanishNumberToWords convert 2        System out println          SpanishNumberToWords convert 3        System out println          SpanishNumberToWords convert 4        System out println          SpanishNumberToWords convert 5        System out println          SpanishNumberToWords convert 7        System out println          SpanishNumberToWords convert 12        System out println          SpanishNumberToWords convert 16        System out println          SpanishNumberToWords convert 19        System out println          SpanishNumberToWords convert 21        System out println          SpanishNumberToWords convert 24        System out println          SpanishNumberToWords convert 28        System out println          SpanishNumberToWords convert 29        System out println          SpanishNumberToWords convert 30        System out println          SpanishNumberToWords convert 31        System out println          SpanishNumberToWords convert 42        System out println          SpanishNumberToWords convert 71        System out println          SpanishNumberToWords convert 72        System out println          SpanishNumberToWords convert 80        System out println          SpanishNumberToWords convert 81        System out println          SpanishNumberToWords convert 89        System out println          SpanishNumberToWords convert 90        System out println          SpanishNumberToWords convert 91        System out println          SpanishNumberToWords convert 97        System out println          SpanishNumberToWords convert 100        System out println          SpanishNumberToWords convert 101        System out println          SpanishNumberToWords convert 110        System out println          SpanishNumberToWords convert 120        System out println          SpanishNumberToWords convert 200        System out println          SpanishNumberToWords convert 201        System out println          SpanishNumberToWords convert 232        System out println          SpanishNumberToWords convert 999        System out println          SpanishNumberToWords convert 521        System out println          SpanishNumberToWords convert 912        System out println          SpanishNumberToWords convert 999        System out println          SpanishNumberToWords convert 1000        System out println          SpanishNumberToWords convert 1001        System out println          SpanishNumberToWords convert 10000        System out println          SpanishNumberToWords convert 10001        System out println          SpanishNumberToWords convert 100000        System out println          SpanishNumberToWords convert 267578        System out println          SpanishNumberToWords convert 3000000000L        System out println          SpanishNumberToWords convert 2147483647                    OUTPUT             cero             un             dos             tres             cuatro             cinco             siete             doce             dieciseis             diecinueve             veintiun             veinticuatro             veintiocho             veintinueve             treinta             treinta y un             cuarenta y dos             setenta y un             setenta y dos             ochenta             ochenta y un             ochenta y nueve             noventa             noventa y un             noventa y siete             cien             ciento un             ciento diez             ciento veinte             doscientos             doscientos un             doscientos treinta y dos             novecientos noventa y nueve             quinientos veintiun             novecientos doce             novecientos noventa y nueve             mil              mil un             diez mil              diez mil un             cien mil              doscientos sesenta y siete mil quinientos setenta y ocho             tres mil millones              dos mil millones ciento cuarenta y siete millones cuatrocientos ochenta y tres mil seiscientos cuarenta y siete

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import java lang    import java io    public class rupee   public static void main String   args throws  IOException     int len 0 revnum 0 i dup 0 j 0 k 0   int gvalue    String   ones   one   Two   Three   Four   Five   Six   Seven   Eight   Nine   Eleven   Twelve   Thirteen   Fourteen   Fifteen   Sixteen   Seventeen   Eighteen   Nineteen           String   twos   Ten   Twenty   Thirty   Fourty   fifty   Sixty   Seventy   eighty   Ninety       System out println   n Enter value    InputStreamReader b new InputStreamReader System in   BufferedReader br new BufferedReader b   gvalue Integer parseInt br readLine     if gvalue  10   System out println  Ten     else if gvalue  100   System out println  Hundred     else if gvalue  1000  System out println  Thousand     dup gvalue  for i 0 dup gt 0 i      revnum revnum 10 dup 10  len    dup dup 10    while j lt len    if gvalue lt 10    System out println ones gvalue-1      else if gvalue gt 10 amp  amp gvalue lt  19    System out println ones gvalue-2    break    else if gvalue gt 19 amp  amp gvalue lt 100    k gvalue 10  gvalue gvalue 10  System out println twos k-1      else if gvalue gt 100 amp  amp gvalue lt 1000    k gvalue 100  gvalue gvalue 100  System out println ones k-1    Hundred      else if gvalue gt  1000 amp  amp gvalue lt 9999    k gvalue 1000  gvalue gvalue 1000  System out println ones k-1   Thousand          else if gvalue gt  11000 amp  amp gvalue lt  19000        k gvalue 1000      gvalue gvalue 1000      System out println twos k-2   Thousand             else if gvalue gt  12000 amp  amp gvalue lt 100000    k gvalue 10000      gvalue gvalue 10000  System out println ones gvalue-1      else   System out println            j

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In this post i have just update Yanick Rochon s code  I have make it workable with lower version of java 1 6 and i was getting the output for 1 00   one and nbsp  nbsp hundredth  So i have update the code  New i get the output for 1 00   one and zero hundredth   I don t not what should i do  Add a new answer or edit that post  As the answer is highly ranked so i have made a new post with updating the code  I have just change this two things have mention above          This class will convert numeric values into an english representation        For units  see   http   www jimloy com math billion htm         author yanick rochon gmail com     public class NumberToWords        static public class ScaleUnit           private int exponent          private String   names           private ScaleUnit int exponent  String    names                this exponent   exponent              this names   names                     public int getExponent                 return exponent                     public String getName int index                return names index                                   See http   www wordiq com definition Names of large numbers             static private ScaleUnit   SCALE UNITS   new ScaleUnit                 new ScaleUnit 63   vigintillion    decilliard                new ScaleUnit 60   novemdecillion    decillion                new ScaleUnit 57   octodecillion    nonilliard                new ScaleUnit 54   septendecillion    nonillion                new ScaleUnit 51   sexdecillion    octilliard                new ScaleUnit 48   quindecillion    octillion                new ScaleUnit 45   quattuordecillion    septilliard                new ScaleUnit 42   tredecillion    septillion                new ScaleUnit 39   duodecillion    sextilliard                new ScaleUnit 36   undecillion    sextillion                new ScaleUnit 33   decillion    quintilliard                new ScaleUnit 30   nonillion    quintillion                new ScaleUnit 27   octillion    quadrilliard                new ScaleUnit 24   septillion    quadrillion                new ScaleUnit 21   sextillion    trilliard                new ScaleUnit 18   quintillion    trillion                new ScaleUnit 15   quadrillion    billiard                new ScaleUnit 12   trillion    billion                new ScaleUnit 9   billion    milliard                new ScaleUnit 6   million    million                new ScaleUnit 3   thousand    thousand                new ScaleUnit 2   hundred    hundred                   new ScaleUnit 1   ten    ten                   new ScaleUnit 0   one    one                new ScaleUnit -1   tenth    tenth    new ScaleUnit -2   hundredth    hundredth                new ScaleUnit -3   thousandth    thousandth                new ScaleUnit -4   ten-thousandth    ten-thousandth                new ScaleUnit -5   hundred-thousandth    hundred-thousandth                new ScaleUnit -6   millionth    millionth                new ScaleUnit -7   ten-millionth    ten-millionth                new ScaleUnit -8   hundred-millionth    hundred-millionth                new ScaleUnit -9   billionth    milliardth                new ScaleUnit -10   ten-billionth    ten-milliardth                new ScaleUnit -11   hundred-billionth    hundred-milliardth                new ScaleUnit -12   trillionth    billionth                new ScaleUnit -13   ten-trillionth    ten-billionth                new ScaleUnit -14   hundred-trillionth    hundred-billionth                new ScaleUnit -15   quadrillionth    billiardth                new ScaleUnit -16   ten-quadrillionth    ten-billiardth                new ScaleUnit -17   hundred-quadrillionth    hundred-billiardth                new ScaleUnit -18   quintillionth    trillionth                new ScaleUnit -19   ten-quintillionth    ten-trillionth                new ScaleUnit -20   hundred-quintillionth    hundred-trillionth                new ScaleUnit -21   sextillionth    trilliardth                new ScaleUnit -22   ten-sextillionth    ten-trilliardth                new ScaleUnit -23   hundred-sextillionth    hundred-trilliardth                new ScaleUnit -24   septillionth    quadrillionth                new ScaleUnit -25   ten-septillionth    ten-quadrillionth                new ScaleUnit -26   hundred-septillionth    hundred-quadrillionth            static public enum Scale           SHORT  LONG           public String getName int exponent                for  ScaleUnit unit   SCALE UNITS                    if  unit getExponent      exponent                        return unit getName this ordinal                                                 return                                     Change this scale to support American and modern British value  short scale  or Traditional        British value  long scale              static public Scale SCALE   Scale SHORT       static abstract public class AbstractProcessor            static protected final String SEPARATOR                static protected final int NO VALUE   -1           protected List lt Integer gt  getDigits long value                ArrayList lt Integer gt  digits   new ArrayList lt Integer gt                 if  value    0                    digits add 0                 else                   while  value  gt  0                        digits add 0   int  value   10                       value    10                                              return digits                     public String getName long value                return getName Long toString value                       public String getName double value                return getName Double toString value                       abstract public String getName String value              static public class UnitProcessor extends AbstractProcessor            static private final String   TOKENS   new String      one    two    three    four                    five    six    seven    eight    nine    ten    eleven    twelve    thirteen                    fourteen    fifteen    sixteen    seventeen    eighteen    nineteen               Override         public String getName String value                StringBuilder buffer   new StringBuilder                 int offset   NO VALUE              int number              if  value length    gt  3                    number   Integer valueOf value substring value length   - 3   10                 else                   number   Integer valueOf value  10                             number    100              if  number  lt  10                    offset    number   10  - 1                     number    10                else if  number  lt  20                    offset    number   20  - 1                     number    100                             if  offset    NO VALUE  amp  amp  offset  lt  TOKENS length                    buffer append TOKENS offset                               return buffer toString                          static public class TensProcessor extends AbstractProcessor            static private final String   TOKENS   new String      twenty    thirty    fourty                    fifty    sixty    seventy    eighty    ninety              static private final String UNION SEPARATOR    -            private UnitProcessor unitProcessor   new UnitProcessor              Override         public String getName String value                StringBuilder buffer   new StringBuilder                boolean tensFound   false               int number              if  value length    gt  3                    number   Integer valueOf value substring value length   - 3   10                 else                   number   Integer valueOf value  10                             number    100     keep only two digits             if  number  gt   20                    buffer append TOKENS  number   10  - 2                    number    10                  tensFound   true                else                   number    20                             if  number    0                    if  tensFound                        buffer append UNION SEPARATOR                                     buffer append unitProcessor getName number                               return buffer toString                         static public class HundredProcessor extends AbstractProcessor            private int EXPONENT   2           private UnitProcessor unitProcessor   new UnitProcessor            private TensProcessor tensProcessor   new TensProcessor              Override         public String getName String value                StringBuilder buffer   new StringBuilder                 int number              if     equals value                     number   0                else if  value length    gt  4                    number   Integer valueOf value substring value length   - 4   10                 else                   number   Integer valueOf value  10                             number    1000     keep at least three digits              if  number  gt   100                    buffer append unitProcessor getName number   100                    buffer append SEPARATOR                   buffer append SCALE getName EXPONENT                               String tensName   tensProcessor getName number   100                if      equals tensName   amp  amp   number  gt   100                     buffer append SEPARATOR                             buffer append tensName                return buffer toString                         static public class CompositeBigProcessor extends AbstractProcessor            private HundredProcessor hundredProcessor   new HundredProcessor            private AbstractProcessor lowProcessor          private int exponent           public CompositeBigProcessor int exponent                if  exponent  lt   3                    lowProcessor   hundredProcessor                else                   lowProcessor   new CompositeBigProcessor exponent - 3                             this exponent   exponent                     public String getToken                 return SCALE getName getPartDivider                        protected AbstractProcessor getHighProcessor                 return hundredProcessor                     protected AbstractProcessor getLowProcessor                 return lowProcessor                     public int getPartDivider                 return exponent                      Override         public String getName String value                StringBuilder buffer   new StringBuilder                 String high  low              if  value length    lt  getPartDivider                      high                       low   value                else                   int index   value length   - getPartDivider                    high   value substring 0  index                   low   value substring index                              String highName   getHighProcessor   getName high               String lowName   getLowProcessor   getName low                if      equals highName                     buffer append highName                   buffer append SEPARATOR                   buffer append getToken                      if      equals lowName                         buffer append SEPARATOR                                                if      equals lowName                     buffer append lowName                              return buffer toString                         static public class DefaultProcessor extends AbstractProcessor            static private String MINUS    minus           static private String UNION AND    and            static private String ZERO TOKEN    zero            private AbstractProcessor processor   new CompositeBigProcessor 63             Override         public String getName String value                boolean negative   false              if  value startsWith  -                      negative   true                  value   value substring 1                              int decimals   value indexOf                   String decimalValue   null              if  0  lt   decimals                    decimalValue   value substring decimals   1                   value   value substring 0  decimals                              String name   processor getName value                if     equals name                     name   ZERO TOKEN                else if  negative                    name   MINUS concat SEPARATOR  concat name                              if    null    decimalValue       equals decimalValue                       String zeroDecimalValue                       for  int i   0  i  lt  decimalValue length    i                          zeroDecimalValue   zeroDecimalValue    0                                     if  decimalValue equals zeroDecimalValue                         name   name concat SEPARATOR  concat UNION AND  concat SEPARATOR  concat                               zero   concat SEPARATOR  concat                              SCALE getName -decimalValue length                        else                       name   name concat SEPARATOR  concat UNION AND  concat SEPARATOR  concat                              processor getName decimalValue   concat SEPARATOR  concat                              SCALE getName -decimalValue length                                                    return name                        static public AbstractProcessor processor       public static void main String    args             processor   new DefaultProcessor             long   values   new long     0  4  10  12  100  108  299  1000  1003  2040  45213  100000                  100005  100010  202020  202022  999999  1000000  1000001  10000000  10000007                  99999999  Long MAX VALUE  Long MIN VALUE             String   strValues   new String      0    1 30    0001 00    3 141592              for  long val   values                System out println val           processor getName val                       for  String strVal   strValues                System out println strVal           processor getName strVal                          generate a very big number            StringBuilder bigNumber   new StringBuilder            for  int d   0  d  lt  66  d                  bigNumber append  char    Math random     10     0                       bigNumber append               for  int d   0  d  lt  26  d                  bigNumber append  char    Math random     10     0                       System out println bigNumber toString             processor getName bigNumber toString                The output is  0   zero 4   four 10   ten 12   twelve 100   one hundred 108   one hundred eight 299   two hundred ninety-nine 1000   one thousand 1003   one thousand three 2040   two thousand fourty 45213   fourty-five thousand two hundred thirteen 100000   one hundred thousand 100005   one hundred thousand five 100010   one hundred thousand ten 202020   two hundred two thousand twenty 202022   two hundred two thousand twenty-two 999999   nine hundred ninety-nine thousand nine hundred ninety-nine 1000000   one million 1000001   one million one 10000000   ten million 10000007   ten million seven 99999999   ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine 9223372036854775807   nine quintillion two hundred twenty-three quadrillion three hundred seventy-two trillion thirty-six billion eight hundred fifty-four million seven hundred seventy-five thousand eight hundred seven -9223372036854775808   minus nine quintillion two hundred twenty-three quadrillion three hundred seventy-two trillion thirty-six billion eight hundred fifty-four million seven hundred seventy-five thousand eight hundred eight 0 0   zero and zero tenth 1 30   one and thirty hundredth 0001 00   one and zero hundredth 3 141592   three and one hundred fourty-one thousand five hundred ninety-two millionth 354064188376576616844741830273568537829518115677552666352927559274 76892492652888527014418647   three hundred fifty-four vigintillion sixty-four novemdecillion one hundred eighty-eight octodecillion three hundred seventy-six septendecillion five hundred seventy-six sexdecillion six hundred sixteen quindecillion eight hundred fourty-four quattuordecillion seven hundred fourty-one tredecillion eight hundred thirty duodecillion two hundred seventy-three undecillion five hundred sixty-eight decillion five hundred thirty-seven nonillion eight hundred twenty-nine octillion five hundred eighteen septillion one hundred fifteen sextillion six hundred seventy-seven quintillion five hundred fifty-two quadrillion six hundred sixty-six trillion three hundred fifty-two billion nine hundred twenty-seven million five hundred fifty-nine thousand two hundred seventy-four and seventy-six septillion eight hundred ninety-two sextillion four hundred ninety-two quintillion six hundred fifty-two quadrillion eight hundred eighty-eight trillion five hundred twenty-seven billion fourteen million four hundred eighteen thousand six hundred fourty-seven hundred-septillionth

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public class NumberConverter        private String   singleDigit          one     two     three         four     five    six     seven     eight     nine         private String   tens      ten     eleven     twelve     thirteen                 fourteen     fifteen    sixteen     seventeen     eighteen     nineteen         private String   twoDigits              twenty     thirty                 forty     fifty    sixty     seventy     eighty     ninety         public String convertToWords String input            long number   Long parseLong input           int size   input length            if  size  lt   3                int num    int  number              return handle3Digits num             else if  size  gt  3  amp  amp  size  lt   6                int thousand    int  number 1000               int hundred    int   number   1000               String thousands   handle3Digits thousand                String hundreds   handle3Digits hundred               String word                    if   thousands isEmpty                      word   thousands    thousand                             word    hundreds              return word            else if  size  gt  6  amp  amp  size  lt   9                int million    int   number  1000000               number   number   1000000              int thousand    int  number 1000               int hundred    int   number   1000                String millions   handle3Digits million               String thousands   handle3Digits thousand               String hundreds   handle3Digits hundred                String word                    if   millions isEmpty                      word   millions    million                             if   thousands isEmpty                      word    thousands    thousand                             word    hundreds              return word                     return  Not implemented yet                private String handle3Digits int number            if  number  lt   0              return              String word               if  number 100  gt  0                int dividend   number 100              word   singleDigit dividend      hundred               number   number   100                    if  number 10  gt  1                int dividend   number 10              number   number   10              word    twoDigits dividend             else if  number 10    1                number   number   10              word    tens number               return word            else               number   number   10                    if  number  gt  0                word    singleDigit number                      return word

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You probably don t need this any more  but I recently wrote a java class to do this  Apparently Yanick Rochon did something similar  It will convert numbers up to 999 Novemdecillion  999 10 60   It could do more if I knew what came after Novemdecillion  but I would be willing to bet it s unnecessary  Just feed the number as a string in cents  The output is also grammatically correct   Here is a link to the Bitbucket Repo

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class NumberToWord       private static Map lt Integer  String gt  numbers   new HashMap lt Integer  String gt         private static Set lt Integer gt  numberSet   new TreeSet lt Integer gt  new Comparator lt Integer gt              public int compare Integer o1  Integer o2                return o2 - o1                         static           init            numberSet addAll numbers keySet                public static void main String   args            System out println getNumberInWord 1898765                         convert positive numbers in word format number  gt  0 only             static String getNumberInWord int number            StringBuilder word   new StringBuilder            for  Integer n   numberSet                if  number  gt  0  amp  amp  number  gt   n                    int div   number   n                  String strNum   numbers get div                   if  strNum    null                        word append getNumberInWord div                                         for less than 100  we don t need to say 1                 if  strNum    null  amp  amp   div  gt  1    n  gt  100                       word append strNum                          word append numbers get n                          number   number   n                                  return word toString               static void init             numbers put 0   Zero            numbers put 1   One            numbers put 2   Two            numbers put 3   Three            numbers put 4   Four            numbers put 5   Five            numbers put 6   Six            numbers put 7   Seven            numbers put 8   Eight            numbers put 9   Nine            numbers put 10   Ten            numbers put 11   Eleven            numbers put 12   Twelve            numbers put 13   Thirteen            numbers put 14   Fourteen            numbers put 15   Fifteen            numbers put 16   Sixteen            numbers put 17   Seventeen            numbers put 18   Eighteeen            numbers put 19   Nineteen            numbers put 20   Twenty            numbers put 30   Thirty            numbers put 40   Forty            numbers put 50   Fifty            numbers put 60   Sixty            numbers put 70   Seventy            numbers put 80   Eighty            numbers put 90   Ninty            numbers put 100   Hundred            numbers put 1000   Thousand            numbers put 1000000   Million            numbers put 100000000   Billion

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This program can convert up to 102 digits long number  Suggestions and comments are highly appreciated   package com kegeesoft          author Chandana Gamage  94 710 980 120     author maheshgamage375 gmail com     author KeGee Software Solutions     import java math BigDecimal  import java math BigInteger   public class Converter       private final BigInteger zero   new BigInteger  0                private final BigInteger scale     new BigInteger 33                                               private final String scaleName        Duotrigintillion    Untrigintillion    Trigintillion                                             Nonvigintillion    Octovigintillion    Septvigintillion                                             Sexvigintillion    Quinvigintillion    Quattuorvigintillion                                             Trevigintillion    Duovigintillion    Unvigintillion                                             Vigintillion    Novemdecillion    Octodecillion                                             Septemdecillion    Sexdecillion    Quindecillion                                             Quattuordecillion     Tredecillion    Duodecillion                                             Undecillion    Decillion    Nonillion    Octillion                                             Septillion    Sextillion    Quintillion    Quadrillion                                             Trillion    Billion    Million    Thousand        private final String ones           One    Two    Three    Four    Five    Six    Seven    Eight    Nine                                        Ten    Eleven    Twelve    Thirteen    Fourteen    Fifteen    Sixteen                                        Seventeen    Eighteen    Nineteen            private final String tens              Twenty    Thirty    Forty    Fifty    Sixty    Seventy    Eighty    Ninety        private int index   0          private String shortValueInWords           private String output           private String decimalInWords           private String valueInWords       public String setValue BigInteger value  throws Exception          return this bigValueInWords value              public String setValue BigDecimal value  throws Exception          int indexOfDecimalPoint    value toString    indexOf                   Split and pass interger value of given decimal value to constructor         String tempIntValue    value toString    substring 0  indexOfDecimalPoint           BigInteger intValue   new BigInteger tempIntValue               Split and pass decimal value of given decimal value to constructor         String tempDeciValue    value toString    substring indexOfDecimalPoint 1  value toString   length             BigInteger deciValue   new BigInteger tempDeciValue            this bigValueInWords intValue           this decimalValueInWords deciValue           return null             public String setValue BigDecimal value  String currencyName  String centsName  throws Exception          int indexOfDecimalPoint    value toString    indexOf                   Split and pass interger value of given decimal value to constructor         String tempIntValue    value toString    substring 0  indexOfDecimalPoint           BigInteger intValue   new BigInteger tempIntValue               Split and pass decimal value of given decimal value to constructor         String tempDeciValue    value toString    substring indexOfDecimalPoint 1  value toString   length              SuppressWarnings  UnusedAssignment           BigInteger deciValue   null              Concatenate  0  if decimal value has only single digit         if tempDeciValue length      1               deciValue   new BigInteger tempDeciValue concat  0              else              deciValue   new BigInteger tempDeciValue                      this output   currencyName              this bigValueInWords intValue           this centsValueInWords deciValue  centsName            return null             private String bigValueInWords BigInteger value  throws Exception             Build scale array         int exponent   99          for  int i   0  i  lt  scale length  i                  scale i    new BigInteger  10   pow exponent               exponent   exponent - 3                        Idntify whether given value is a minus value or not             if    yes then pass value without minus sign             and pass Minus word to output                    if value compareTo zero     -1               value   new BigInteger value toString   substring 1 value toString   length                  output     Minus                          Get value in words of big numbers  duotrigintillions to thousands          for  int i 0  i  lt  scale length  i                  if  value divide scale i    compareTo zero   1               this index    int  value divide scale i    intValue                output    shortValueInWords this index    scaleName i               value   value mod scale i                                        Get value in words of short numbers  hundreds  tens and ones          output    shortValueInWords  int  value intValue                  Get rid of any space at the beginning of output and return value in words         return this valueInWords   output replaceFirst    s                   private String shortValueInWords int shortValue  throws Exception             Get hundreds         if String valueOf shortValue  length    3               shortValueInWords   ones shortValue   100    Hundred  shortValueInWords shortValue   100                         Get tens         if String valueOf shortValue  length     2  amp  amp  shortValue  gt   20               if  shortValue   10  gt  2  amp  amp   shortValue   10  gt  0                   shortValueInWords   tens shortValue   10    ones shortValue   10                                       Get tens between 10 and 20         if String valueOf shortValue  length     2  amp  amp  shortValue  gt   10  amp  amp  shortValue  lt  20               shortValueInWords   ones shortValue                         Get ones         if String valueOf shortValue  length    1               shortValueInWords   ones shortValue                      return this shortValueInWords             private String decimalValueInWords BigInteger decimalValue  throws Exception          decimalInWords     Point              Get decimals in point form  0 563   zero point five six three          for int i 0  i  lt   decimalValue toString   length     i                 decimalInWords    ones Integer parseInt String valueOf decimalValue toString   charAt i                         return this decimalInWords             private String centsValueInWords BigInteger decimalValue  String centsName  throws Exception          decimalInWords     and      centsName              Get cents in words  5 52   five and cents fifty two          if decimalValue intValue      0               decimalInWords    shortValueInWords decimalValue intValue      Zero only            else              decimalInWords    shortValueInWords decimalValue intValue      only                       return this decimalInWords             public String getValueInWords            return this valueInWords   decimalInWords             public static void main String args             Converter c1   new Converter            Converter c2   new Converter            Converter c3   new Converter            Converter c4   new Converter             try                 Get integer value in words             c1 setValue new BigInteger  15634886                 System out println c1 getValueInWords                     Get minus integer value in words             c2 setValue new BigInteger  -15634886                 System out println c2 getValueInWords                     Get decimal value in words             c3 setValue new BigDecimal  358621 56895                 System out println c3 getValueInWords                     Get currency value in words             c4 setValue new BigDecimal  358621 56    Dollar   Cents                System out println c4 getValueInWords              catch Exception e               e printStackTrace

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ICU4J contains nice number-spellout support  The files with the  rules  can be easily edited  and it s no problem to add other languages  we did it e g  for Polish and Russian

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Take a look at Tradukisto  It s a Java library I ve written which does the job

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This program will print words for a number between 0 to 99999        public class NumberInWords5Digits            static int testcase1   93284           public static void main String args                 NumberInWords5Digits testInstance   new NumberInWords5Digits                String result   testInstance inWords testcase1               System out println  Result     result                        write your code here         public String inWords int num               int digit   0              String word                   int temp   num              while temp gt 0                                if temp 10  gt   0                      digit                    temp   temp 10                             if num    0                  return  zero                System out println num               if digit    1                  word   inTens num  digit               else if digit    2                  word   inTens num  digit               else if digit    3                  word   inHundreds num  digit               else if digit    4                  word   inThousands num  digit               else if digit    5                  word   inThousands num  digit               return word                     public String inTens int num  int digit               int tens   0              int units   0              if digit    2                                      tens   num 10                  units   num 10                            String unit                   String ten                   String word                    if num    10               word    ten   return word                if num    11               word    eleven   return word               if num    12               word    twelve   return word               if num    13               word    thirteen   return word               if num    14               word    fourteen   return word               if num    15               word    fifteen   return word               if num    16               word    sixteen   return word               if num    17               word    seventeen   return word               if num    18               word    eighteen   return word               if num    19               word    nineteen   return word                if units    1    num    1                  unit    one               else if units    2    num    2                  unit    two               else if units    3    num    3                  unit    three               else if units    4    num    4                  unit    four               else if units    5    num    5                  unit    five               else if units    6    num    6                  unit    six               else if units    7    num    7                  unit    seven               else if units    8    num    8                  unit    eight               else if units    9    num    9                  unit    nine                if tens    2                  ten    twenty               else if tens    3                  ten    thirty               else if tens    4                  ten    forty               else if tens    5                  ten    fifty               else if tens    6                  ten    sixty               else if tens    7                  ten    seventy               else if tens    8                  ten    eighty               else if tens    9                  ten    ninety                if digit    1                  word   unit              else if digit    2                  word   ten         unit              return word                       inHundreds 525  3          public String inHundreds int num  int digit                int hundreds   num 100      5             int tensAndUnits   num 100      25             String hundred                   String tenAndUnit                   String word                    tenAndUnit   inTens tensAndUnits  2                if hundreds    1                  hundred    one hundred               else if hundreds    2                  hundred    two hundred               else if hundreds    3                  hundred    three hundred               else if hundreds    4                  hundred    four hundred               else if hundreds    5                  hundred    five hundred               else if hundreds    6                  hundred    six hundred               else if hundreds    7                  hundred    seven hundred               else if hundreds    8                  hundred    eight hundred               else if hundreds    9                  hundred    nine hundred                word   hundred         tenAndUnit              return word                     public String inThousands int num  int digit                int thousands   0                    int hundredsAndOthers   num 1000              String thousand                   String hundredAndOther                   String word                   if digit    5                                thousands   num 1000                  thousand   inTens thousands  2                                         else if digit    4                                thousands   num 1000                  thousand   inTens thousands  1                              if hundredsAndOthers 100    0     in case of  023                  hundredAndOther   inTens hundredsAndOthers  2               else                 hundredAndOther   inHundreds hundredsAndOthers  3                word   thousand     thousand     hundredAndOther               return word

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Below java program demonstrate how to convert a number from zero to one million  NumberToStringLiteral class   public class NumberToStringLiteral        public static void main String   args                NumberToStringLiteral numberToStringLiteral   new NumberToStringLiteral            int number   123456          String stringLiteral   numberToStringLiteral convertIntegerToStringLiteral number           System out println stringLiteral                  private String convertIntegerToStringLiteral int number                if  number  lt  100              return from 0 To 100 number                    if   number  gt   100  amp  amp  number  lt  1000               return from 101 To 999 number                    if   number  gt   1000  amp  amp  number  lt   99999              return from 1000 To 99999 number                    if  number  lt   1000000              return from 100000 and above number                    return Digits OVER ONE MILLION getStringLiteral                   private String from 0 To 100 int number                if  number  lt   19               return ZeroToNineteen getStringLiteral number                    String LastDigit     ZeroToNineteen getStringLiteral number   10     ZeroToNineteen ZERO getStringLiteral                                    ZeroToNineteen getStringLiteral number   10     quot  quot           return Tens getStringLiteralFromNumber   number -  number   10         quot   quot    LastDigit                 private String from 101 To 999 int number                String LastDigit     ZeroToNineteen getStringLiteral number   100     ZeroToNineteen ZERO getStringLiteral                                   ZeroToNineteen getStringLiteral number   100      quot  quot                    if    number   100   gt  19              LastDigit   from 0 To 100 number   100                        if  LastDigit isBlank                return ZeroToNineteen getStringLiteral number   100     Digits getStringLiteral getNumberOfDigit 0                         return ZeroToNineteen getStringLiteral number   100     Digits getStringLiteral getNumberOfDigit number     LastDigit                     private String from 1000 To 99999 int number                String LastDigit    number   1000  lt  20     from 0 To 100 number   1000    from 101 To 999 number   1000                    if  LastDigit equalsIgnoreCase ZeroToNineteen ZERO getStringLiteral                 LastDigit    quot  quot                    return from 0 To 100 number   1000     Digits getStringLiteral getNumberOfDigit number     LastDigit                 private String from 100000 and above int number                if  number    1000000              return Digits ONE MILLION getStringLiteral                     String lastThreeDigit    number   1000  lt   100     from 0 To 100 number   1000    from 101 To 999 number   1000                    if  lastThreeDigit equalsIgnoreCase ZeroToNineteen ZERO toString                 lastThreeDigit    quot  quot                    String number1   from 101 To 999 number   1000    Digits THOUSAND getStringLiteral      lastThreeDigit          return String valueOf number1                  private int getNumberOfDigit int number                int count   0          while   number    0                         number     10              count                      return count           ZeroToNineteen enum   public enum ZeroToNineteen       ZERO 0   quot zero quot         ONE 1   quot one quot        TWO 2   quot two quot        THREE 3   quot three quot        FOUR 4   quot four quot        FIVE 5   quot five quot        SIX 6   quot six quot        SEVEN 7   quot seven quot        EIGHT 8   quot eight quot        NINE 9   quot nine quot        TEN 10   quot ten quot        ELEVEN 11   quot eleven quot        TWELVE 12   quot twelve quot        THIRTEEN 13   quot thirteen quot        FOURTEEN 14   quot fourteen quot        FIFTEEN 15   quot fifteen quot        SIXTEEN 16   quot sixteen quot        SEVENTEEN 17   quot seventeen quot        EIGHTEEN 18   quot eighteen quot        NINETEEN 19   quot nineteen quot                  private int number      private String stringLiteral      public static Map lt Integer  String gt  stringLiteralMap           ZeroToNineteen int number  String stringLiteral                this number   number          this stringLiteral   stringLiteral                 public int getNumber                 return this number                 public String getStringLiteral                 return this stringLiteral                 public static String getStringLiteral int number                if  stringLiteralMap    null              addData                     return stringLiteralMap get number                  private static void addData                 stringLiteralMap   new HashMap lt  gt             for  ZeroToNineteen zeroToNineteen   ZeroToNineteen values                          stringLiteralMap put zeroToNineteen getNumber    zeroToNineteen getStringLiteral                        Tens enum   public enum Tens       TEN 10   quot ten quot        TWENTY 20   quot twenty quot        THIRTY 30   quot thirty quot        FORTY 40   quot forty quot        FIFTY 50   quot fifty quot        SIXTY 60   quot sixty quot        SEVENTY 70   quot seventy quot        EIGHTY 80   quot eighty quot        NINETY 90   quot ninety quot        HUNDRED 100   quot one hundred quot                  private int number      private String stringLiteral      private static Map lt Integer  String gt  stringLiteralMap           Tens int number  String stringLiteral                this number   number          this stringLiteral   stringLiteral                 public int getNumber                 return this number                 public String getStringLiteral                 return this stringLiteral                 public static String getStringLiteralFromNumber int number                if  stringLiteralMap    null              addDataToStringLiteralMap                     return stringLiteralMap get number                  private static void addDataToStringLiteralMap                 stringLiteralMap   new HashMap lt Integer  String gt             for  Tens tens   Tens values                stringLiteralMap put tens getNumber    tens getStringLiteral              Digits enum   public enum Digits       HUNDRED 3   quot  hundred and  quot        THOUSAND 4   quot  thousand  quot        TEN THOUSAND 5  quot  thousand  quot        ONLY HUNDRED 0   quot  hundred quot         ONE MILLION 1000000   quot one million quot        OVER ONE MILLION 1000001   quot over one million quot             private int digit      private String stringLiteral      private static Map lt Integer  String gt  stringLiteralMap           private Digits int digit  String stringLiteral                this digit   digit          this stringLiteral   stringLiteral                 public int getDigit                 return this digit                 public String getStringLiteral                 return this stringLiteral                 public static String getStringLiteral int number                if   stringLiteralMap    null               addStringLiteralMap                     return stringLiteralMap get number                  private static void addStringLiteralMap                 stringLiteralMap   new HashMap lt Integer  String gt             for   Digits digits   Digits values                 stringLiteralMap put digits getDigit    digits getStringLiteral              Output   one hundred and twenty three thousand four hundred and fifty six  Note  I have used all three enum for constant variables  you can also use array  Hope this will help you  Let me know if you have any doubt in comment section

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I tried to make the code more readable  This works for numbers within integer range import java util HashMap  import java util LinkedList  import java util Map  import java util Scanner   public class Solution2        static Map lt Integer  String gt  numberMap   new HashMap lt Integer  String gt         static Map lt Integer  String gt  tensMap   new HashMap lt Integer  String gt         static Map lt Integer  String gt  exponentsMap   new HashMap lt Integer  String gt              public static void main String   args             LinkedList lt String gt  wordList   new LinkedList lt String gt             Scanner scan   new Scanner System in           int input   scan nextInt            scan close             exponentsMap put 3   quot thousand quot            exponentsMap put 6   quot million quot            exponentsMap put 9   quot billion quot             tensMap put 2   quot twenty quot            tensMap put 3   quot thirty quot            tensMap put 4   quot forty quot            tensMap put 5   quot fifty quot            tensMap put 6   quot sixty quot            tensMap put 7   quot seventy quot            tensMap put 8   quot eighty quot            tensMap put 9   quot ninety quot             numberMap put 1   quot one quot            numberMap put 2   quot two quot            numberMap put 3   quot three quot            numberMap put 4   quot four quot            numberMap put 5   quot five quot            numberMap put 6   quot six quot            numberMap put 7   quot seven quot            numberMap put 8   quot eight quot            numberMap put 9   quot nine quot            numberMap put 10   quot ten quot            numberMap put 11   quot eleven quot            numberMap put 12   quot twelve quot            numberMap put 13   quot thirteen quot            numberMap put 14   quot fourteen quot            numberMap put 15   quot fifteen quot            numberMap put 16   quot sixteen quot            numberMap put 17   quot seventeen quot            numberMap put 18   quot eighteen quot            numberMap put 19   quot nineteen quot             int temp   input                   int exponentCounter  0          while temp gt 0                   words from 1 to 99             addLastTwo temp 100 wordList               temp temp 100                              add hundreds before exponents             if temp  0                    wordList addFirst  quot hundred quot                    wordList addFirst numberMap getOrDefault temp 10  quot  quot                     temp   temp 10                                            words for exponents             if temp  0                    exponentCounter  3                  wordList addFirst exponentsMap getOrDefault exponentCounter  quot  quot                                     wordList stream   filter word - gt   word contentEquals  quot  quot    forEach word - gt  System out print word    quot   quot                private static void addLastTwo int num  LinkedList lt String gt  wordList            if  num  gt  19                wordList addFirst numberMap getOrDefault num   10  quot  quot                 wordList addFirst tensMap getOrDefault num   10  quot  quot                            else               wordList addFirst numberMap getOrDefault num  quot  quot

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this might help  public String numberToWords long number        if  number    0            return  zero             if  number  lt  0            return  minus     numberToWords Math abs number              String words           if   number   10000000   gt  0            words    numberToWords number   10000000      Crore            number    10000000            if   number   100000   gt  0            words    numberToWords number   100000      Lakh            number    100000            if   number   1000   gt  0            words    numberToWords number   1000      Thousand            number    1000            if   number   100   gt  0            words    numberToWords number   100      Hundred            number    100            if  number  gt  0            if   words equals                    words     and                      if  number  lt  20                words    number            else               words     number               if   number   10   gt  0                    words     -     number   10                                     return words

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I have used 2 dimensional array        import java util Scanner       public class numberEnglish      public static void main String args                  String       aryNumbers   new String 9  4       aryNumbers 0  0     one       aryNumbers 0  1     ten       aryNumbers 0  2     one hundred and       aryNumbers 0  3     one thousand        aryNumbers 1  0     two       aryNumbers 1  1     twenty       aryNumbers 1  2     two hundred and       aryNumbers 1  3     two thousand        aryNumbers 2  0     three       aryNumbers 2  1     thirty       aryNumbers 2  2     three hundred and       aryNumbers 2  3     three thousand        aryNumbers 3  0     four       aryNumbers 3  1     fourty       aryNumbers 3  2     four hundred and       aryNumbers 3  3     four thousand        aryNumbers 4  0     five       aryNumbers 4  1     fifty       aryNumbers 4  2     five hundred and       aryNumbers 4  3     five thousand        aryNumbers 5  0     six       aryNumbers 5  1     sixty       aryNumbers 5  2     six hundred and       aryNumbers 5  3     six thousand        aryNumbers 6  0     seven       aryNumbers 6  1     seventy       aryNumbers 6  2     seven hundred and       aryNumbers 6  3     seven thousand        aryNumbers 7  0     eight       aryNumbers 7  1     eighty       aryNumbers 7  2     eight hundred and       aryNumbers 7  3     eight thousand        aryNumbers 8  0     nine       aryNumbers 8  1     ninty       aryNumbers 8  2     nine hundred and       aryNumbers 8  3     nine thousand           System out println aryNumbers 0        aryNumbers 0               int number 0      Scanner sc   new Scanner System in       System out println   Enter Number 4 digited number           number   sc nextInt        int temp   number      int count 1      String english         String tenglish           if number    0                System out println                       System out println  Zero            System out println                       sc close            return            while temp   0                 int r   temp 10          if r  0                        tenglish     zero                count                      else                        int t1 r-1              int t2   count-1                System out println t1      t2               count                tenglish   aryNumbers t1  t2                  System out println aryNumbers t1  t2                      english   tenglish       english          temp   temp 10               System out println aryNumbers 0  0        english   english replace  ten  zero    ten        english   english replace  twenty  zero    twenty        english   english replace  thirty  zero    thirty        english   english replace  fourty  zero    fourty        english   english replace  fifty  zero    fifty        english   english replace  sixty  zero    sixty        english   english replace  seventy  zero    seventy        english   english replace  eighty  zero    eighty        english   english replace  ninety  zero    ninety         english   english replace  ten one    eleven        english   english replace  ten two    twelve        english   english replace  ten three    thirteen        english   english replace  ten four    fourteen        english   english replace  ten five    fifteen        english   english replace  ten six    sixteen        english   english replace  ten seven    seventeen        english   english replace  ten eight    eighteen        english   english replace  ten nine    nineteen        english   english replace   zero             int length   english length        String sub   english substring length-6 length-3         System out println length         System out println sub       if sub equals  and                    System out println  hello            english english substring 0 length-6             System out println                                                      System out println english       System out println                                                      sc close

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You can use RuleBasedNumberFormat  for example result will give you Ninety  ULocale locale   new ULocale Locale US      us english Double d   Double parseDouble 90   NumberFormat formatter   new RuleBasedNumberFormat locale  RuleBasedNumberFormat SPELLOUT   String result   formatter format d     It supports a wide range of languages

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Because you cannot have a general algorithm for every locale  no  You have to implement your own algorithm for every locale that you are supporting      EDIT     Just for the heck of it  I played around until I got this class  It cannot display Long MIN VALUE because of bit restrictions    but I presume it could be modified and change long value types to double for decimal or even bigger numbers It can display any numbers up to 66 digits and 26 decimals using a string representation of the number  You may add more ScaleUnit for more decimals            This class will convert numeric values into an english representation        For units  see   http   www jimloy com math billion htm         author yanick rochon gmail com     public class NumberToWords        static public class ScaleUnit           private int exponent          private String   names          private ScaleUnit int exponent  String   names                this exponent   exponent              this names   names                    public int getExponent                 return exponent                    public String getName int index                return names index                                   See http   www wordiq com definition Names of large numbers             static private ScaleUnit   SCALE UNITS   new ScaleUnit             new ScaleUnit 63   vigintillion    decilliard            new ScaleUnit 60   novemdecillion    decillion            new ScaleUnit 57   octodecillion    nonilliard            new ScaleUnit 54   septendecillion    nonillion            new ScaleUnit 51   sexdecillion    octilliard            new ScaleUnit 48   quindecillion    octillion            new ScaleUnit 45   quattuordecillion    septilliard            new ScaleUnit 42   tredecillion    septillion            new ScaleUnit 39   duodecillion    sextilliard            new ScaleUnit 36   undecillion    sextillion            new ScaleUnit 33   decillion    quintilliard            new ScaleUnit 30   nonillion    quintillion            new ScaleUnit 27   octillion    quadrilliard            new ScaleUnit 24   septillion    quadrillion            new ScaleUnit 21   sextillion    trilliard            new ScaleUnit 18   quintillion    trillion            new ScaleUnit 15   quadrillion    billiard            new ScaleUnit 12   trillion    billion            new ScaleUnit 9   billion    milliard            new ScaleUnit 6   million    million            new ScaleUnit 3   thousand    thousand            new ScaleUnit 2   hundred    hundred              new ScaleUnit 1   ten    ten              new ScaleUnit 0   one    one            new ScaleUnit -1   tenth    tenth            new ScaleUnit -2   hundredth    hundredth            new ScaleUnit -3   thousandth    thousandth            new ScaleUnit -4   ten-thousandth    ten-thousandth            new ScaleUnit -5   hundred-thousandth    hundred-thousandth            new ScaleUnit -6   millionth    millionth            new ScaleUnit -7   ten-millionth    ten-millionth            new ScaleUnit -8   hundred-millionth    hundred-millionth            new ScaleUnit -9   billionth    milliardth            new ScaleUnit -10   ten-billionth    ten-milliardth            new ScaleUnit -11   hundred-billionth    hundred-milliardth            new ScaleUnit -12   trillionth    billionth            new ScaleUnit -13   ten-trillionth    ten-billionth            new ScaleUnit -14   hundred-trillionth    hundred-billionth            new ScaleUnit -15   quadrillionth    billiardth            new ScaleUnit -16   ten-quadrillionth    ten-billiardth            new ScaleUnit -17   hundred-quadrillionth    hundred-billiardth            new ScaleUnit -18   quintillionth    trillionth            new ScaleUnit -19   ten-quintillionth    ten-trillionth            new ScaleUnit -20   hundred-quintillionth    hundred-trillionth            new ScaleUnit -21   sextillionth    trilliardth            new ScaleUnit -22   ten-sextillionth    ten-trilliardth            new ScaleUnit -23   hundred-sextillionth    hundred-trilliardth            new ScaleUnit -24   septillionth   quadrillionth            new ScaleUnit -25   ten-septillionth   ten-quadrillionth            new ScaleUnit -26   hundred-septillionth   hundred-quadrillionth                static public enum Scale           SHORT          LONG           public String getName int exponent                for  ScaleUnit unit   SCALE UNITS                    if  unit getExponent      exponent                        return unit getName this ordinal                                                 return                                      Change this scale to support American and modern British value  short scale         or Traditional British value  long scale              static public Scale SCALE   Scale SHORT         static abstract public class AbstractProcessor            static protected final String SEPARATOR                static protected final int NO VALUE   -1           protected List lt Integer gt  getDigits long value                ArrayList lt Integer gt  digits   new ArrayList lt Integer gt                 if  value    0                    digits add 0                 else                   while  value  gt  0                        digits add 0   int  value   10                       value    10                                              return digits                     public String getName long value                return getName Long toString value                       public String getName double value                return getName Double toString value                       abstract public String getName String value              static public class UnitProcessor extends AbstractProcessor            static private final String   TOKENS   new String                  one    two    three    four    five    six    seven    eight    nine                ten    eleven    twelve    thirteen    fourteen    fifteen    sixteen    seventeen    eighteen    nineteen                       Override         public String getName String value                StringBuilder buffer   new StringBuilder                 int offset   NO VALUE              int number              if  value length    gt  3                    number   Integer valueOf value substring value length   - 3   10                 else                   number   Integer valueOf value  10                             number    100              if  number  lt  10                    offset    number   10  - 1                    number    10                else if  number  lt  20                    offset    number   20  - 1                    number    100                             if  offset    NO VALUE  amp  amp  offset  lt  TOKENS length                    buffer append TOKENS offset                               return buffer toString                          static public class TensProcessor extends AbstractProcessor            static private final String   TOKENS   new String                  twenty    thirty    forty    fifty    sixty    seventy    eighty    ninety                      static private final String UNION SEPARATOR    -            private UnitProcessor unitProcessor   new UnitProcessor              Override         public String getName String value                StringBuilder buffer   new StringBuilder                boolean tensFound   false               int number              if  value length    gt  3                    number   Integer valueOf value substring value length   - 3   10                 else                   number   Integer valueOf value  10                             number    100       keep only two digits             if  number  gt   20                    buffer append TOKENS  number   10  - 2                    number    10                  tensFound   true                else                   number    20                             if  number    0                    if  tensFound                        buffer append UNION SEPARATOR                                     buffer append unitProcessor getName number                               return buffer toString                         static public class HundredProcessor extends AbstractProcessor            private int EXPONENT   2           private UnitProcessor unitProcessor   new UnitProcessor            private TensProcessor tensProcessor   new TensProcessor              Override         public String getName String value                StringBuilder buffer   new StringBuilder                 int number              if  value isEmpty                      number   0                else if  value length    gt  4                    number   Integer valueOf value substring value length   - 4   10                 else                   number   Integer valueOf value  10                             number    1000      keep at least three digits              if  number  gt   100                    buffer append unitProcessor getName number   100                    buffer append SEPARATOR                   buffer append SCALE getName EXPONENT                               String tensName   tensProcessor getName number   100                if   tensName isEmpty    amp  amp   number  gt   100                     buffer append SEPARATOR                             buffer append tensName                return buffer toString                         static public class CompositeBigProcessor extends AbstractProcessor            private HundredProcessor hundredProcessor   new HundredProcessor            private AbstractProcessor lowProcessor          private int exponent           public CompositeBigProcessor int exponent                if  exponent  lt   3                    lowProcessor   hundredProcessor                else                   lowProcessor   new CompositeBigProcessor exponent - 3                             this exponent   exponent                     public String getToken                 return SCALE getName getPartDivider                        protected AbstractProcessor getHighProcessor                 return hundredProcessor                     protected AbstractProcessor getLowProcessor                 return lowProcessor                     public int getPartDivider                 return exponent                      Override         public String getName String value                StringBuilder buffer   new StringBuilder                 String high  low              if  value length    lt  getPartDivider                      high                       low   value                else                   int index   value length   - getPartDivider                    high   value substring 0  index                   low   value substring index                              String highName   getHighProcessor   getName high               String lowName   getLowProcessor   getName low                if   highName isEmpty                      buffer append highName                   buffer append SEPARATOR                   buffer append getToken                      if   lowName isEmpty                          buffer append SEPARATOR                                                if   lowName isEmpty                      buffer append lowName                              return buffer toString                         static public class DefaultProcessor extends AbstractProcessor            static private String MINUS    minus           static private String UNION AND    and            static private String ZERO TOKEN    zero            private AbstractProcessor processor   new CompositeBigProcessor 63             Override         public String getName String value                boolean negative   false              if  value startsWith  -                      negative   true                  value   value substring 1                              int decimals   value indexOf                   String decimalValue   null              if  0  lt   decimals                    decimalValue   value substring decimals   1                   value   value substring 0  decimals                              String name   processor getName value                if  name isEmpty                      name   ZERO TOKEN                else if  negative                    name   MINUS concat SEPARATOR  concat name                               if    null    decimalValue    decimalValue isEmpty                       name   name concat SEPARATOR  concat UNION AND  concat SEPARATOR                       concat processor getName decimalValue                        concat SEPARATOR  concat SCALE getName -decimalValue length                                 return name                        static public AbstractProcessor processor        public static void main String   args             processor   new DefaultProcessor             long   values   new long                 0              4              10              12              100              108              299              1000              1003              2040              45213              100000              100005              100010              202020              202022              999999              1000000              1000001              10000000              10000007              99999999              Long MAX VALUE              Long MIN VALUE                     String   strValues   new String                  0001 2                3 141592                      for  long val   values                System out println val           processor getName val                        for  String strVal   strValues                System out println strVal           processor getName strVal                           generate a very big number            StringBuilder bigNumber   new StringBuilder            for  int d 0  d lt 66  d                  bigNumber append   char    Math random     10     0                       bigNumber append               for  int d 0  d lt 26  d                  bigNumber append   char    Math random     10     0                        System out println bigNumber toString             processor getName bigNumber toString                  and a sample output  for the random big number generator   0   zero 4   four 10   ten 12   twelve 100   one hundred 108   one hundred eight 299   two hundred ninety-nine 1000   one thousand 1003   one thousand three 2040   two thousand fourty 45213   fourty-five thousand two hundred thirteen 100000   one hundred thousand 100005   one hundred thousand five 100010   one hundred thousand ten 202020   two hundred two thousand twenty 202022   two hundred two thousand twenty-two 999999   nine hundred ninety-nine thousand nine hundred ninety-nine 1000000   one million 1000001   one million one 10000000   ten million 10000007   ten million seven 99999999   ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine 9223372036854775807   nine quintillion two hundred twenty-three quadrillion three hundred seventy-two trillion thirty-six billion eight hundred fifty-four million seven hundred seventy-five thousand eight hundred seven -9223372036854775808   minus nine quintillion two hundred twenty-three quadrillion three hundred seventy-two trillion thirty-six billion eight hundred fifty-four million seven hundred seventy-five thousand eight hundred eight 0001 2   one and two tenth 3 141592   three and one hundred fourty-one thousand five hundred ninety-two millionth 694780458103427072928672912656674465845126458162617425283733729646 85695031739734695391404376   six hundred ninety-four vigintillion seven hundred eighty novemdecillion four hundred fifty-eight octodecillion one hundred three septendecillion four hundred twenty-seven sexdecillion seventy-two quindecillion nine hundred twenty-eight quattuordecillion six hundred seventy-two tredecillion nine hundred twelve duodecillion six hundred fifty-six undecillion six hundred seventy-four decillion four hundred sixty-five nonillion eight hundred fourty-five octillion one hundred twenty-six septillion four hundred fifty-eight sextillion one hundred sixty-two quintillion six hundred seventeen quadrillion four hundred twenty-five trillion two hundred eighty-three billion seven hundred thirty-three million seven hundred twenty-nine thousand six hundred fourty-six and eighty-five septillion six hundred ninety-five sextillion thirty-one quintillion seven hundred thirty-nine quadrillion seven hundred thirty-four trillion six hundred ninety-five billion three hundred ninety-one million four hundred four thousand three hundred seventy-six hundred-septillionth

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Here is the code  I don t think there is any method in SE   It basically converts number to string and parses String and associates it with the weight  for example  1000   1 is treated as thousand position and 1 gets mapped to  one  and thousand because of position   This is the code from the website   English  import java text DecimalFormat   public class EnglishNumberToWords      private static final String   tensNames                   ten         twenty         thirty         forty         fifty         sixty         seventy         eighty         ninety          private static final String   numNames                   one         two         three         four         five         six         seven         eight         nine         ten         eleven         twelve         thirteen         fourteen         fifteen         sixteen         seventeen         eighteen         nineteen          private EnglishNumberToWords         private static String convertLessThanOneThousand int number        String soFar       if  number   100  lt  20         soFar   numNames number   100         number    100            else         soFar   numNames number   10         number    10         soFar   tensNames number   10    soFar        number    10            if  number    0  return soFar      return numNames number      hundred    soFar          public static String convert long number           0 to 999 999 999 999     if  number    0    return  zero          String snumber   Long toString number           pad with  0      String mask    000000000000       DecimalFormat df   new DecimalFormat mask       snumber   df format number           XXXnnnnnnnnn     int billions   Integer parseInt snumber substring 0 3           nnnXXXnnnnnn     int millions    Integer parseInt snumber substring 3 6           nnnnnnXXXnnn     int hundredThousands   Integer parseInt snumber substring 6 9           nnnnnnnnnXXX     int thousands   Integer parseInt snumber substring 9 12         String tradBillions      switch  billions        case 0        tradBillions             break      case 1         tradBillions   convertLessThanOneThousand billions            billion          break      default         tradBillions   convertLessThanOneThousand billions            billion              String result    tradBillions       String tradMillions      switch  millions        case 0        tradMillions             break      case 1         tradMillions   convertLessThanOneThousand millions               million          break      default         tradMillions   convertLessThanOneThousand millions               million              result    result   tradMillions       String tradHundredThousands      switch  hundredThousands        case 0        tradHundredThousands             break      case 1         tradHundredThousands    one thousand          break      default         tradHundredThousands   convertLessThanOneThousand hundredThousands               thousand              result    result   tradHundredThousands       String tradThousand      tradThousand   convertLessThanOneThousand thousands       result    result   tradThousand          remove extra spaces      return result replaceAll     s        replaceAll    b  s 2    b                         testing       param args         public static void main String   args        System out println          EnglishNumberToWords convert 0        System out println          EnglishNumberToWords convert 1        System out println          EnglishNumberToWords convert 16        System out println          EnglishNumberToWords convert 100        System out println          EnglishNumberToWords convert 118        System out println          EnglishNumberToWords convert 200        System out println          EnglishNumberToWords convert 219        System out println          EnglishNumberToWords convert 800        System out println          EnglishNumberToWords convert 801        System out println          EnglishNumberToWords convert 1316        System out println          EnglishNumberToWords convert 1000000        System out println          EnglishNumberToWords convert 2000000        System out println          EnglishNumberToWords convert 3000200        System out println          EnglishNumberToWords convert 700000        System out println          EnglishNumberToWords convert 9000000        System out println          EnglishNumberToWords convert 9001000        System out println          EnglishNumberToWords convert 123456789        System out println          EnglishNumberToWords convert 2147483647        System out println          EnglishNumberToWords convert 3000000010L                     zero          one          sixteen          one hundred          one hundred eighteen          two hundred          two hundred nineteen          eight hundred          eight hundred one          one thousand three hundred sixteen          one million          two millions          three millions two hundred          seven hundred thousand          nine millions          nine millions one thousand          one hundred twenty three millions four hundred              fifty six thousand seven hundred eighty nine          two billion one hundred forty seven millions              four hundred eighty three thousand six hundred forty seven          three billion ten                  Fran  ais Quite different than the english version but french is a lot more difficult   package com rgagnon howto   import java text     class FrenchNumberToWords     private static final String   dizaineNames                          vingt        trente        quarante        cinquante        soixante        soixante        quatre-vingt        quatre-vingt          private static final String   uniteNames1                  un        deux        trois        quatre        cinq        six        sept        huit        neuf        dix        onze        douze        treize        quatorze        quinze        seize        dix-sept        dix-huit        dix-neuf          private static final String   uniteNames2                          deux        trois        quatre        cinq        six        sept        huit        neuf        dix          private FrenchNumberToWords         private static String convertZeroToHundred int number         int laDizaine   number   10      int lUnite   number   10      String resultat            switch  laDizaine        case 1       case 7       case 9         lUnite   lUnite   10        break      default                s  parateur  -   et          String laLiaison           if  laDizaine  gt  1          laLiaison    -                cas particuliers     switch  lUnite        case 0        laLiaison             break      case 1         if  laDizaine    8            laLiaison    -                 else           laLiaison     et                  break      case 11         if  laDizaine  7            laLiaison     et                  break      default                dizaines en lettres     switch  laDizaine        case 0        resultat   uniteNames1 lUnite         break      case 8         if  lUnite    0            resultat   dizaineNames laDizaine                 else           resultat   dizaineNames laDizaine                                    laLiaison   uniteNames1 lUnite                 break      default         resultat   dizaineNames laDizaine                                  laLiaison   uniteNames1 lUnite             return resultat         private static String convertLessThanOneThousand int number         int lesCentaines   number   100      int leReste   number   100      String sReste   convertZeroToHundred leReste        String resultat      switch  lesCentaines        case 0        resultat   sReste        break      case 1         if  leReste  gt  0            resultat    cent     sReste                else           resultat    cent                 break      default         if  leReste  gt  0            resultat   uniteNames2 lesCentaines      cent     sReste                else           resultat   uniteNames2 lesCentaines      cents                     return resultat         public static String convert long number           0    999 999 999 999     if  number    0    return  z  ro          String snumber   Long toString number           pad des  0      String mask    000000000000       DecimalFormat df   new DecimalFormat mask       snumber   df format number           XXXnnnnnnnnn     int lesMilliards   Integer parseInt snumber substring 0 3           nnnXXXnnnnnn     int lesMillions    Integer parseInt snumber substring 3 6           nnnnnnXXXnnn     int lesCentMille   Integer parseInt snumber substring 6 9           nnnnnnnnnXXX     int lesMille   Integer parseInt snumber substring 9 12         String tradMilliards      switch  lesMilliards        case 0        tradMilliards             break      case 1         tradMilliards   convertLessThanOneThousand lesMilliards               milliard          break      default         tradMilliards   convertLessThanOneThousand lesMilliards               milliards              String resultat    tradMilliards       String tradMillions      switch  lesMillions        case 0        tradMillions             break      case 1         tradMillions   convertLessThanOneThousand lesMillions               million          break      default         tradMillions   convertLessThanOneThousand lesMillions               millions              resultat    resultat   tradMillions       String tradCentMille      switch  lesCentMille        case 0        tradCentMille             break      case 1         tradCentMille    mille          break      default         tradCentMille   convertLessThanOneThousand lesCentMille               mille              resultat    resultat   tradCentMille       String tradMille      tradMille   convertLessThanOneThousand lesMille       resultat    resultat   tradMille       return resultat         public static void main String   args        System out println          FrenchNumberToWords convert 0        System out println          FrenchNumberToWords convert 9        System out println          FrenchNumberToWords convert 19        System out println          FrenchNumberToWords convert 21        System out println          FrenchNumberToWords convert 28        System out println          FrenchNumberToWords convert 71        System out println          FrenchNumberToWords convert 72        System out println          FrenchNumberToWords convert 80        System out println          FrenchNumberToWords convert 81        System out println          FrenchNumberToWords convert 89        System out println          FrenchNumberToWords convert 90        System out println          FrenchNumberToWords convert 91        System out println          FrenchNumberToWords convert 97        System out println          FrenchNumberToWords convert 100        System out println          FrenchNumberToWords convert 101        System out println          FrenchNumberToWords convert 110        System out println          FrenchNumberToWords convert 120        System out println          FrenchNumberToWords convert 200        System out println          FrenchNumberToWords convert 201        System out println          FrenchNumberToWords convert 232        System out println          FrenchNumberToWords convert 999        System out println          FrenchNumberToWords convert 1000        System out println          FrenchNumberToWords convert 1001        System out println          FrenchNumberToWords convert 10000        System out println          FrenchNumberToWords convert 10001        System out println          FrenchNumberToWords convert 100000        System out println          FrenchNumberToWords convert 2000000        System out println          FrenchNumberToWords convert 3000000000L        System out println          FrenchNumberToWords convert 2147483647                    OUTPUT          z  ro          neuf          dix-neuf          vingt et un          vingt-huit          soixante et onze          soixante-douze          quatre-vingt          quatre-vingt-un          quatre-vingt-neuf          quatre-vingt-dix          quatre-vingt-onze          quatre-vingt-dix-sept          cent          cent un          cent dix          cent vingt          deux cents          deux cent un          deux cent trente-deux          neuf cent quatre-vingt-dix-neuf          mille          mille un          dix mille          dix mille un          cent mille          deux millions          trois milliards          deux milliards cent quarante-sept millions                  quatre cent quatre-vingt-trois mille six cent quarante-sept                 You can handle  dollar and cent  conversion by calling the  convert  method two times   String phrase    12345 67    Float num   new Float  phrase     int dollars    int Math floor  num     int cent    int Math floor    num - dollars     100 0f      String s          EnglishNumberToWords convert  dollars       and                EnglishNumberToWords convert  cent       cents      Another way to use a built-in function of your DBMS  if available   For Oracle  SQL gt  select to char to date 873  J     JSP   as converted form from dual   CONVERTED FORM --------------------------- EIGHT HUNDRED SEVENTY-THREE  SQL gt   JSP  means   J   the Julian format  SP   spells the word for the number passed to to date

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Find this code for Indian rupees and in lakhs  amp  crores than Million and Billion  You can pass String or Bigdecimal to the method  This will give the correct output for paisa as well  package yourpackage   import java math BigDecimal  import java util ArrayList  import java util Collections  import java util HashMap   public class Currency            public static String convertToWords BigDecimal num            return convertToWords num toString                public static String convertToWords String num            BigDecimal bd   new BigDecimal num           long number   bd longValue            long no   bd longValue            int decimal    int   bd remainder BigDecimal ONE  doubleValue     100           int digits length   String valueOf no  length            int i   0          ArrayList lt String gt  str   new ArrayList lt  gt             HashMap lt Integer  String gt  words   new HashMap lt  gt             words put 0   quot  quot            words put 1   quot One quot            words put 2   quot Two quot            words put 3   quot Three quot            words put 4   quot Four quot            words put 5   quot Five quot            words put 6   quot Six quot            words put 7   quot Seven quot            words put 8   quot Eight quot            words put 9   quot Nine quot            words put 10   quot Ten quot            words put 11   quot Eleven quot            words put 12   quot Twelve quot            words put 13   quot Thirteen quot            words put 14   quot Fourteen quot            words put 15   quot Fifteen quot            words put 16   quot Sixteen quot            words put 17   quot Seventeen quot            words put 18   quot Eighteen quot            words put 19   quot Nineteen quot            words put 20   quot Twenty quot            words put 30   quot Thirty quot            words put 40   quot Forty quot            words put 50   quot Fifty quot            words put 60   quot Sixty quot            words put 70   quot Seventy quot            words put 80   quot Eighty quot            words put 90   quot Ninety quot            String digits        quot  quot    quot Hundred quot    quot Thousand quot    quot Lakh quot    quot Crore quot             while  i  lt  digits length                int divider    i    2    10   100              number   no   divider              no   no   divider              i    divider    10   1   2              if  number  gt  0                    int counter   str size                    String plural    counter  gt  0  amp  amp  number  gt  9     quot s quot     quot  quot                   String tmp    number  lt  21    words get Integer valueOf  int  number      quot   quot    digits counter    plural                           words get Integer valueOf  int  Math floor number   10    10      quot   quot                                    words get Integer valueOf  int   number   10       quot   quot    digits counter    plural                  str add tmp                 else                   str add  quot  quot                                     Collections reverse str           String Rupees   String join  quot   quot   str  trim             String paise    decimal   gt  0                    quot  And  quot    words get Integer valueOf  int   decimal - decimal   10       quot   quot                            words get Integer valueOf  int   decimal   10       quot  Paise  quot                     quot  quot           return  quot Rupees  quot    Rupees   paise    quot  Only quot                          param args the command line arguments             public static void main String   args            System out println  quot 56721351    quot    Currency convertToWords new BigDecimal 56721351             System out println  quot 76521351 61    quot    Currency convertToWords  quot 76521351 61 quot               When you run this program for 56721351 as Bigdecimal  and 76521351 61 as String  the output is 56721351   Rupees Five Crore Sixty Seven Lakhs Twenty One Thousands Three Hundred Fifty One Only 76521351 61   Rupees Seven Crore Sixty Five Lakhs Twenty One Thousands Three Hundred Fifty One And Sixty One Paise  Only

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I think this may help you   programme is very simple and works fine    import java util     public class NumberToWord        public void pw int n  String ch                String one                       one     two     three     four     five     six     seven                     eight     Nine     ten     eleven     twelve     thirteen                     fourteen    fifteen     sixteen     seventeen     eighteen                     nineteen             String ten                   twenty     thirty     forty     fifty                     sixty    seventy     eighty     ninety             if  n  gt  19                System out print ten n   10          one n   10              else               System out print one n                      if  n  gt  0              System out print ch              public static void main String   args                 int n   0          Scanner s   new Scanner System in           System out print  Enter an integer number              n   s nextInt            if  n  lt   0              System out print  Enter numbers greater than 0            else                       NumberToWord a   new NumberToWord                System out print  After conversion number in words is                  a pw  n   1000000000     Hundred                a pw  n   10000000    100    crore                a pw   n   100000    100     lakh                a pw   n   1000    100     thousand                a pw   n   100    10     hundred                a pw  n   100

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Here is a very simple class NumberInWords java that can have the job done very easily  String numberInWords   NumberInWords convertNumberToWords 27546     twenty seven thousand and five hundred forty six  It s important to know that this class is only capable of converting int datatype

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This is another way    with limited range   public static String numToWord Integer i      final  String   units      Zero    One    Two    Three            Four    Five    Six    Seven    Eight    Nine    Ten    Eleven            Twelve    Thirteen    Fourteen    Fifteen    Sixteen            Seventeen    Eighteen    Nineteen      final  String   tens              Twenty    Thirty    Forty            Fifty    Sixty    Seventy    Eighty    Ninety         if  i  lt  20          return units i       if  i  lt  100          return tens i   10      i   10  gt  0          numToWord i   10             if  i  lt  1000          return units i   100      Hundred                      i   100  gt  0      and     numToWord i   100             if  i  lt  1000000          return numToWord i   1000      Thousand                       i   1000  gt  0          numToWord i   1000             return numToWord i   1000000      Million                   i   1000000  gt  0          numToWord i   1000000

[java] How to convert number to words in java

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