Re: Regexes: Forcing the LAST Match

From:

ram@zedat.fu-berlin.de (Stefan Ram)

Newsgroups:

comp.lang.java.programmer

Date:

7 Jan 2008 19:49:48 GMT

Message-ID:

<last-occurrence-20080107204800@ram.dialup.fu-berlin.de>

Hal Vaughan <hal@halblog.com> writes:

Okay. I got it.

  One still might ask, whether there is a way to just inspect
  the end of the string. I am not absolutely sure, whether the
  following code really does that, but I would try it this way:

public class Main
{
  public static java.lang.String pos( final java.lang.String text )
  {
    final java.util.regex.Matcher matcher =
    java.util.regex.Pattern.compile
    ( "(?<=(alpha.{0,2147483642}?)$)" ).
    matcher( text );

    return matcher.find() ? matcher.group( 1 ) : ""; }

  public static void main( final java.lang.String[] args )
  {
    final java.lang.String source = "alpha beta alpha gamma alpha delta";

    final java.lang.String stringToBeRemoved = pos( source );

    java.lang.System.out.println( stringToBeRemoved );

    final java.lang.String result = source.substring
    ( 0, source.length() - stringToBeRemoved.length() );

    java.lang.System.out.println( result ); }}

alpha delta
alpha beta alpha gamma