How do format a phone number as a String in Java

Question

I have been storing phone numbers as longs and I would like to simply add hyphens when printing the phone number as a string   I tried using DecimalFormat but that doesn t like the hyphen  Probably because it is meant for formatting decimal numbers and not longs   long phoneFmt   123456789L  DecimalFormat phoneFmt   new DecimalFormat     -   -        System out println phoneFmt format phoneNum      doesn t work as I had hoped   Ideally  I would like to have parenthesis on the area code too   new DecimalFormat       -   -          What is the correct way to do this

User · Answer

Kotlin val number   088899998888  val phone   number phoneFormatter    fun String phoneFormatter    String   return this replace  quot   B      d 4        d   quot  toRegex     quot - quot      The result will be  0888-9999-8888

User · Answer

U can format any string containing non numeric characters also to your desired format use my util class to format  usage is very simple  public static void main String   args       String num    ab12345  amp 67890        System out println PhoneNumberUtil formateToPhoneNumber num   XXX -XXX-XXXX  10        output   123 -456-7890  u can specify any foramt such as XXX-XXX-XXXX and length of the phone number   if input length is greater than specified length then string will be trimmed   Get my class from here  https   github com gajeralalji PhoneNumberUtil blob master PhoneNumberUtil java

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I d have thought you need to use a MessageFormat rather than DecimalFormat  That should be more flexible

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You could also use https   github com googlei18n libphonenumber  Here is an example    import com google i18n phonenumbers NumberParseException  import com google i18n phonenumbers PhoneNumberUtil  import com google i18n phonenumbers Phonenumber   String s    18005551234   PhoneNumberUtil phoneUtil   PhoneNumberUtil getInstance    Phonenumber PhoneNumber phoneNumber   phoneUtil parse s  Locale US getCountry     String formatted   phoneUtil format phoneNumber  PhoneNumberUtil PhoneNumberFormat NATIONAL     Here you can get the library on your classpath  http   mvnrepository com artifact com googlecode libphonenumber libphonenumber

User · Answer

DecimalFormat doesn t allow arbitrary text within the number to be formatted  just as a prefix or a suffix  So it won t be able to help you there   In my opinion  storing a phone number as a numeric value is wrong  entirely  What if I want to store an international number  Many countries use   to indicate a country code  e g   1 for USA Canda   others use 00  e g  001    Both of those can t really be represented in a numeric data type   Is that number 1555123 or 001555123

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Using StringBuilder for performance   long number   12345678L   System out println getPhoneFormat String valueOf number      public static String getPhoneFormat String number        if  number    null    number isEmpty      number length    lt  6    number length    gt  15                return number             return new StringBuilder      append number substring 0  3                append       append number substring 3  6                append  -   append number substring 6                toString

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To get your desired output   long phoneFmt   123456789L    get a 12 digits String  filling with left  0   on the prefix     DecimalFormat phoneDecimalFmt   new DecimalFormat  0000000000    String phoneRawString  phoneDecimalFmt format phoneFmt    java text MessageFormat phoneMsgFmt new java text MessageFormat    0  - 1 - 2           suposing a grouping of 3-3-4 String   phoneNumArr  phoneRawString substring 0  3             phoneRawString substring 3 6             phoneRawString substring 6     System out println phoneMsgFmt format phoneNumArr      The result at the Console looks like this       012 -345-6789   For storing phone numbers  you should consider using a data type other than numbers

User · Answer

You can use String replaceFirst with regex method like       long phoneNum   123456789L      System out println String valueOf phoneNum  replaceFirst     d 3     d 3     d        1 - 2- 3

User · Answer

If you really need the right way then you can use Google s recently open sourced libphonenumber

User · Answer

String formatterPhone   String format   s- s- s   phoneNumber substring 0  3   phoneNumber substring 3  6   phoneNumber substring 6  10

User · Answer

Pattern phoneNumber   Pattern compile     d 3     d 3     d 4             Matcher matcher   phoneNumber numberAsLineOf10Symbols   if  matcher matches        return       matcher group 1      -   matcher group 2     -    matcher group 3

User · Answer

The easiest way to do this is by using the built in MaskFormatter in the javax swing text library   You can do something like this     import javax swing text MaskFormatter   String phoneMask      -   -       String phoneNumber   123423452345    MaskFormatter maskFormatter  new MaskFormatter phoneMask   maskFormatter setValueContainsLiteralCharacters false   maskFormatter valueToString phoneNumber

User · Answer

You could use the substring and concatenation for easy formatting too   telephoneNumber       telephoneNumber substring 0  3    -  telephoneNumber substring 3  6   -  telephoneNumber substring 6  10     But one thing to note is that you must check for the lenght of the telephone number field just to make sure that your formatting is safe

User · Answer

This is how I ended up doing it   private String printPhone Long phoneNum        StringBuilder sb   new StringBuilder 15       StringBuilder temp   new StringBuilder phoneNum toString          while  temp length    lt  10          temp insert 0   0         char   chars   temp toString   toCharArray         sb append           for  int i   0  i  lt  chars length  i              if  i    3              sb append                else if  i    6              sb append  -            sb append chars i               return sb toString        I understand that this does not support international numbers  but I m not writing a  real  application so I m not concerned about that  I only accept a 10 character long as a phone number  I just wanted to print it with some formatting   Thanks for the responses

User · Answer

You can implement your own method to do that for you  I recommend you to use something such as this  Using DecimalFormat and MessageFormat  With this method you can use pretty much whatever you want  String Integer Float Double  and the output will be always right   import java text DecimalFormat  import java text MessageFormat          Created by Yamil Garcia Hernandez on 25 4 16       public class test          Constants     public static final DecimalFormat phoneFormatD   new DecimalFormat  0000000000        public static final MessageFormat phoneFormatM   new MessageFormat    0    1 - 2             Example Method on a Main Class     public static void main String    args            try               System out println formatPhoneNumber  8091231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber  18091231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber  451231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber  11231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber  1231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber  231234               catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber                 catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber 0              catch  Exception e                e printStackTrace                      try               System out println formatPhoneNumber 8091231234f              catch  Exception e                e printStackTrace                           Magic     public static String formatPhoneNumber Object phone  throws Exception            double p   0           if  phone instanceof String              p   Double valueOf  String  phone            if  phone instanceof Integer              p    Integer  phone           if  phone instanceof Float              p    Float  phone           if  phone instanceof Double              p    Double  phone           if  p    0    String valueOf p           String valueOf p  length    lt  7              throw new Exception  Paramenter is no valid             String fot   phoneFormatD format p            String extra   fot length    gt  10   fot substring 0  fot length   - 10                fot   fot length    gt  10   fot substring fot length   - 10  fot length      fot           String   arr                      fot charAt 0      0     fot substring 0  3     fot charAt 1      0     fot substring 1  3    fot substring 2  3                   fot substring 3  6                   fot substring 6                     String r   phoneFormatM format arr           r    r contains   0       r replace   0           r          r    extra                 extra         r    r          return  r             Result will be    809  123-1234  1  809  123-1234  45  123-1234  1  123-1234 123-1234 023-1234 java lang NumberFormatException  empty String     at sun misc FloatingDecimal readJavaFormatString FloatingDecimal java 1842      at sun misc FloatingDecimal parseDouble FloatingDecimal java 110      at java lang Double parseDouble Double java 538      at java lang Double valueOf Double java 502      at test formatPhoneNumber test java 66      at test main test java 45  java lang Exception  Paramenter is no valid     at test formatPhoneNumber test java 78      at test main test java 50   809  123-1232

User · Answer

The worst possible solution would be   StringBuilder sb   new StringBuilder    long tmp   phoneFmt  sb append       sb append tmp   10000000   tmp   tmp   10000000  sb append   -    sb apppend tmp   10000   tmp   tmp   10000000  sb append  -    sb append tmp

[java] How do format a phone number as a String in Java?

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