Java Currency Number format

Question

Is there a way to format a decimal as following   100   - gt   100    100 1 - gt   100 10    If it is a round number  omit the decimal part  Otherwise format with two decimal places

User · Answer

double amount  200 0  Locale locale   new Locale  en    US          NumberFormat currencyFormatter   NumberFormat getCurrencyInstance locale   System out println currencyFormatter format amount      or  double amount  200 0  System out println NumberFormat getCurrencyInstance new Locale  en    US             format amount         The best way to display currency    Output      200 00   If you don t want to use sign use this method   double amount   200  DecimalFormat twoPlaces   new DecimalFormat  0 00    System out println twoPlaces format amount         200 00      This also can be use  With the thousand separator     double amount   2000000      System out println String format     2f   amount                   2 000 000 00

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I did not find any good solution after google search  just post my solution for other to reference  use priceToString to format money   public static String priceWithDecimal  Double price        DecimalFormat formatter   new DecimalFormat              00        return formatter format price      public static String priceWithoutDecimal  Double price        DecimalFormat formatter   new DecimalFormat                        return formatter format price      public static String priceToString Double price        String toShow   priceWithoutDecimal price       if  toShow indexOf       gt  0            return priceWithDecimal price         else           return priceWithoutDecimal price

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For the people who wants to format the currency  but does not want it to be based on local  we can do this   val numberFormat   NumberFormat getCurrencyInstance      Default local currency val currency   Currency getInstance  USD                 This make the format not locale specific  numberFormat setCurrency currency      use the formator as you want

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I was crazy enough to write my own function   This will convert integer to currency format  can be modified for decimals as well     String getCurrencyFormat int v           String toReturn               String s    String valueOf v           int length   s length            for int i   length  i  gt 0   --i               toReturn    s charAt i - 1               if  i - length - 1    3    0  amp  amp  i    1  toReturn                           return       new StringBuilder toReturn  reverse   toString

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This is what I did  using an integer to represent the amount as cents instead   public static String format int moneyInCents        String format      Number value      if  moneyInCents   100    0            format     d           value   moneyInCents   100        else           format      2f           value   moneyInCents   100 0            return String format Locale US  format  value       The problem with NumberFormat getCurrencyInstance   is that sometimes you really want  20 to be  20  it just looks better than  20 00   If anyone finds a better way of doing this  using NumberFormat  I m all ears

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I doubt it  The problem is that 100 is never 100 if it s a float  it s normally 99 9999999999 or 100 0000001 or something like that    If you do want to format it that way  you have to define an epsilon  that is  a maximum distance from an integer number  and use integer formatting if the difference is smaller  and a float otherwise   Something like this would do the trick   public String formatDecimal float number      float epsilon   0 004f     4 tenths of a cent   if  Math abs Math round number  - number   lt  epsilon         return String format   10 0f   number      sdb     else        return String format   10 2f   number      dj segfault

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You can just do something like this and pass in the whole number and then the cents after   String format     d  02d  wholeNum change

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public static String formatPrice double value            DecimalFormat formatter          if  value lt  99999            formatter   new DecimalFormat            0 00            else             formatter   new DecimalFormat              00             return formatter format value

User · Answer

This post really helped me to finally get what I want  So I just wanted to contribute my code here to help others  Here is my code with some explanation   The following code   double moneyWithDecimals   5 50  double moneyNoDecimals   5 00  System out println jeroensFormat moneyWithDecimals    System out println jeroensFormat moneyNoDecimals      Will return       5 -     5 50   The actual jeroensFormat   method   public String jeroensFormat double money   Wants to receive value of type double           NumberFormat dutchFormat   NumberFormat getCurrencyInstance            money   money          String twoDecimals   dutchFormat format money     Format to string         if tweeDecimalen matches             00                  String zeroDecimals   twoDecimals substring 0  twoDecimals length   -3                   return zeroDecimals                    if twoDecimals endsWith   00                 String zeroDecimals   String format        0f -   money               return zeroDecimals    Return with  00 replaced to  -                   else    If endsWith     00 the actual twoDecimals string can be returned             return twoDecimals                The method displayJeroensFormat that calls the method jeroensFormat         public void displayJeroensFormat     parameter double                System out println jeroensFormat 10 5      Example for two decimals         System out println jeroensFormat 10 95      Example for two decimals         System out println jeroensFormat 10 00      Example for zero decimals         System out println jeroensFormat 100 000      Example for zero decimals         Will have the following output       10 50     10 95     10 -     100 000  In Holland numbers bigger than     999 - and wit no decimals don t have  -    This code uses your current currency  In my case that s Holland so the formatted string for me will be different than for someone in the US    Holland    999 999 99  US         999 999 99   Just watch the last 3 characters of those numbers  My code has an if statement to check if the last 3 characters are equal to   00   To use this in the US you might have to change that to   00  if it doesn t work already

User · Answer

I think this is simple and clear for printing a currency   DecimalFormat df   new DecimalFormat                    or pattern               System out println df format 12345 678      output   12 345 68  And one of possible solutions for the question   public static void twoDecimalsOrOmit double d        System out println new DecimalFormat d 1    0                   00   format d       twoDecimalsOrOmit  double  100   twoDecimalsOrOmit 100 1     Output   100  100 10

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Format from 1000000 2 to 1 000 000 20  private static final DecimalFormat DF   new DecimalFormat     public static String toCurrency Double d        if  d    null       equals d      NaN  equals d             return   -              BigDecimal bd   new BigDecimal d       bd   bd setScale 2  BigDecimal ROUND HALF UP       DecimalFormatSymbols symbols   DF getDecimalFormatSymbols        symbols setGroupingSeparator           String ret   DF format bd            if  ret indexOf         -1            ret      00             if  ret split      1  length      2            ret     0             return ret

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I know this is an old question but     import java text     public class FormatCurrency       public static void main String   args                double price   123 4567          DecimalFormat df   new DecimalFormat                  System out print df format price

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I m using this one  using StringUtils from commons-lang    Double qty   1 01  String res   String format Locale GERMANY     2f   qty   String fmt   StringUtils removeEnd res    00      You must only take care of the locale and the corresponding String to chop

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If you want work on currencies  you have to use BigDecimal class  The problem is  there s no way to store some float numbers in memory  eg  you can store 5 3456  but not 5 3455   which can effects in bad calculations   There s an nice article how to cooperate with BigDecimal and currencies   http   www javaworld com javaworld jw-06-2001 jw-0601-cents html

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you should do something like this   public static void main String   args        double d1   100d      double d2   100 1d      print d1       print d2      private static void print double d        String s   null      if  Math round d     d            s   String format    2f   d         else           s   String format    0f   d             System out println s       which prints   100  100 10

User · Answer

I agree with  duffymo that you need to use the java text NumberFormat methods for this sort of things   You can actually do all the formatting natively in it without doing any String compares yourself   private String formatPrice final double priceAsDouble         NumberFormat formatter   NumberFormat getCurrencyInstance        if  Math round priceAsDouble   100    100    0            formatter setMaximumFractionDigits 0             return formatter format priceAsDouble       Couple bits to point out     The whole Math round priceAsDouble   100    100 is just working around the inaccuracies of doubles floats   Basically just checking if we round to the hundreds place  maybe this is a U S  bias  are there remaining cents    The trick to remove the decimals is the setMaximumFractionDigits   method   Whatever your logic for determining whether or not the decimals should get truncated  setMaximumFractionDigits   should get used

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We will usually need to do the inverse  if your json money field is an float  it may come as 3 1   3 15 or just 3   In this case you may need to round it for proper display  and to be able to use a mask on an input field later    floatvalue   200 0     it may be 200  200 3 or 200 37  BigDecimal will take care Locale locale   new Locale  en    US          NumberFormat currencyFormatter   NumberFormat getCurrencyInstance locale    BigDecimal valueAsBD   BigDecimal valueOf value       valueAsBD setScale 2  BigDecimal ROUND HALF UP      add digits to match  00 pattern  System out println currencyFormatter format amount

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I d recommend using the java text package    double money   100 1  NumberFormat formatter   NumberFormat getCurrencyInstance    String moneyString   formatter format money   System out println moneyString     This has the added benefit of being locale specific   But  if you must  truncate the String you get back if it s a whole dollar    if  moneyString endsWith   00          int centsIndex   moneyString lastIndexOf   00        if  centsIndex    -1            moneyString   moneyString substring 1  centsIndex

User · Answer

this best way to do that       public static String formatCurrency String amount            DecimalFormat formatter   new DecimalFormat            0 00            return formatter format Double parseDouble amount            100   -   100 00  100 1 -   100 10

User · Answer

NumberFormat currency   NumberFormat getCurrencyInstance    String myCurrency   currency format 123 5   System out println myCurrency     output    123 50   If you want to change the currency   NumberFormat currency   NumberFormat getCurrencyInstance Locale CHINA   String myCurrency   currency format 123 5   System out println myCurrency     output    123 50

User · Answer

Yes   You can use java util formatter  You can use a formatting string like   10 2f

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