How to use String Tokeniser inside this for loop?

[i][i]hi there..
i am reading all the file inside a directory and get the latest modified file than i have to tokenise it and juz read the number. For example my file name that is last modified will be abc_123.txt but i just want it to appear 123.
i manage to do it separately how can i put the tokeniser inside my for loop?
my directory
for (int i = 0; i < files.length; i++)
                    if(files[i].isFile())
                         if(lastModifiedFile == null){
                         lastModifiedFile = files[i];
                         String mylastModifiedFile = lastModifiedFile.toString();
                         StringTokenizer tokens = new StringTokenizer (mylastModifiedFile,".");
                         String modified = tokens.nextToken().substring(modified.length-4);*/
                         if(lastModifiedFile != null)
                              if(lastModifiedFile.lastModified() < files[i].lastModified())
                                   lastModifiedFile = files[i];
my tokeniser is this
String mylastModifiedFile = lastModifiedFile.toString();
                         StringTokenizer tokens = new StringTokenizer (mylastModifiedFile,".");
                         String modified = tokens.nextToken().substring(modified.length-4);*/
               }

[i][i][i]hi there..
i am reading all the file inside a directory and get ...
tokens.nextToken().substring(modified.length-4);*/
               }[/i][i][/i][/i][/i]Is there some reason for this baroque formatting? Please use the
code tags as explained in one of your other threads on this topic:
http://forum.java.sun.com/thread.jspa?threadID=793441&messageID=4510858#4510858

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