Converting Integer to String with comma for thousands

Question

I want to convert an Integer 35634646 to have the thousand     so it should be 35 634 646   What would be the quickest way to doing that

User · Answer

use Extension  import java text NumberFormat  val Int commaString  String   get     NumberFormat getInstance   format this   val String commaString  String   get     NumberFormat getNumberInstance   format this toDouble     val Long commaString  String   get     NumberFormat getInstance   format this   val Double commaString  String   get     NumberFormat getInstance   format this    result  1234 commaString   gt  1 234  1234 456  commaString   gt  1 234 456 1234567890123456789 commaString   gt  1 234 567 890 123 456 789 1234 456 commaString   gt  1 234 456

User · Answer

Integers     int value   100000   String format    d   value      outputs 100 000   Doubles   double value   21403 3144d  String format     2f   value      outputs 21 403 31     String format is pretty powerful   - Edited per psuzzi feedback

User · Answer

First you need to include the JSTL tags  -   lt    taglib prefix  c  uri  http   java sun com jsp jstl core    gt   lt    taglib prefix  fmt  uri  http   java sun com jsp jstl fmt    gt     at the start of the page

User · Answer

System out println NumberFormat getNumberInstance Locale US  format 35634646        Output  35 634 646

User · Answer

The other answers are correct  however double-check your locale before using    d    Locale setDefault Locale US   int bigNumber   35634646  String formattedNumber   String format    d   bigNumber   System out println formattedNumber    Locale setDefault new Locale  pl    PL     formattedNumber   String format    d   bigNumber   System out println formattedNumber     Result   35 634 646 35  634  646

User · Answer

here s a solution for those of you who can t access  numberformat  nor  String format   using a limited version of java inside a framework   Hope it s useful   number  123456789  thousandsSeparator      myNumberString number toString       numberLength myNumberString length  howManySeparators Math floor  numberLength-1  3  formattedString myNumberString substring 0 numberLength- howManySeparators 3   while  howManySeparators gt 0       formattedString formattedString thousandsSeparator myNumberString substring numberLength- howManySeparators 3  numberLength-  howManySeparators-1  3    howManySeparators howManySeparators-1        formattedString

User · Answer

int bigNumber   1234567  String formattedNumber   String format    d   bigNumber

User · Answer

int value   35634646   DecimalFormat myFormatter   new DecimalFormat            String output   myFormatter format value    System out println output     Output  35 634 646

User · Answer

This is a way that also able you to replace default separator with any characters  val myNumber   NumberFormat getNumberInstance Locale US      format 123456789      replace  quot   quot    quot   quot

User · Answer

This solution worked for me   NumberFormat getNumberInstance Locale US  format Integer valueOf  String Your Number

User · Answer

can t you use a   System out printf   n  d  int name     The comma in the printf should add the commas into the  d inter   Not positive about it  but works for me

User · Answer

If the same has to be done in the JSP   use    lt fmt formatNumber pattern      0  value    yourlist yourintvalue   var  formattedVariable    gt   lt c out value    formattedVariable   gt  lt  c out gt    ofcourse for multiple values use     lt c forEach items    yourlist   var  yourlist  gt        lt fmt formatNumber pattern      0  value    yourlist yourintvalue   var  formattedVariable    gt       lt c out value    formattedVariable   gt  lt  c out gt   lt  c forEach gt

User · Answer

Use the  d format specifier with a comma    d  This is by far the easiest way

User · Answer

You ask for quickest  but perhaps you mean  best  or  correct  or  typical    You also ask for commas to indicate thousands  but perhaps you mean  in normal human readable form according to the local custom of your user    You do it as so       int i   35634646      String s   NumberFormat getIntegerInstance   format i     Americans will get  35 634 646   Germans will get  35 634 646   Swiss Germans will get  35 634 646

[java] Converting Integer to String with comma for thousands

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