Delete some lines from file...

Hi,
I'm using this code
      File file = new File(sFile);
      if (!file.exists())
        file.createNewFile();
      fout = new PrintWriter(new OutputStreamWriter(new FileOutputStream(sFile , true)) , true);
PrintWriter fout;
...When file has more then (let's write) 1000 lines, I want to delete last 100 from file.
Can someone help me to do that? Can you posto me a part of code which will done that?
Thanks.

If you want to use "standard" (serial) IO, which reads from the beginning of the file, create a line counter, read the file line-by-line, and when the file size limil is reached, close the file - remaining lines will be truncated from the file.
If the file lines are all equal in length, then you can use the RandomAccessFile methods to directly seek to the desired line and delete lines after that point using the class methods - see the seek and setLength methods.

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Delete some lines from file...

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