replace n and r n with br in java

Question

This has been asked several times for several languages but I can t get it to work  I have a string like this  String str    This is a string  nThis is a long string      And I m trying to replace the  n with  lt br   gt  using  str   str replaceAll    r n  n      lt br   gt       but the  n is not getting replaced  I tried to use this RegEx Tool to verify and I see the same result  The input string does not have a match for    r n  n    What am i doing wrong

User · Answer

It works for me   The Java code works exactly as you wrote it   In the tester  the input string should be   This is a string  This is a long string       with a real linefeed   You can t use   This is a string  nThis is a long string       because it treats  n as the literal sequence backslash  n

User · Answer

A little more robust version of what you re attempting   str   str replaceAll    r n  n r  r  n      lt br   gt

User · Answer

Since my account is new I can t up-vote Nino van Hooff s answer  If your strings are coming from a Windows based source such as an aspx based server  this solution does work   rawText replaceAll       r    n     n      lt br   gt       Seems to be a weird character set issue as the double back-slashes are being interpreted as single slash escape characters  Hence the need for the quadruple slashes above   Again  under most circumstances     r  n   n   should work  but if your strings are coming from a Windows based source try the above   Just an FYI tried everything to correct the issue I was having replacing those line endings  Thought at first was failed conversion from Windows-1252 to UTF-8  But that didn t working either  This solution is what finally did the trick

User · Answer

It works for me   public class Program       public static void main String   args            String str    This is a string  nThis is a long string            str   str replaceAll    r n  n      lt br   gt             System out println str             Result    This is a string  lt br   gt This is a long string    Your problem is somewhere else

User · Answer

That should work  but don t kill yourself trying to figure it out  Just use 2 passes   str    str replaceAll    r n      lt br   gt     str    str replaceAll    n      lt br   gt       Disclaimer  this is not very efficient

User · Answer

This should work  You need to put in two slashes  str   str replaceAll     r  n   n      lt br   gt       In this Reference  there is an example which shows  private final String REGEX      d      a single digit   I have used two slashes in many of my projects and it seems to work fine

User · Answer

For me  this worked   rawText replaceAll       r    n     n        n      Tip  use regex tester for quick testing without compiling in your environment

[java] replace \n and \r\n with <br /> in java

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