Where did the contents of my .txt. file go?

Hi. The following is some code I got off of sun's website that shuffles the contents of whatever file you tell it to. I modified the code so instead of going to std out, it puts the contents back into the file I read it from. My problem is, I had a .txt file with a little over 3000 lines in it. After I ran the program through, I only had 1365 lines. I tried running a different .txt file through that only had 1077 lines in it, and after running the program, I was left with 0 lines in the .txt file.
Did I forget to do something in my code? Why aren't all of my lines coming back?
Thanks for any help in advance!

Originally posted by Jennifer Sohl:
Hi. The following is some code I got off of sun's website...

umm, Jennifer, you didn't post the code.

where is your code?

Oops!

Sorry about that! (Is it still Monday??)

import java.io.*;
import java.util.*;
    public class ShuffleCodes {
        public static void main(String args[])
          throws IOException {
            // check command line argument
            if (args.length != 1) {
                System.err.println("missing input file");
                System.exit(1);
            }
            // open file
            FileReader fr = new FileReader(args[0]);
            BufferedReader br = new
              BufferedReader(fr);
            // read lines from file
int count = 0;
            List list = new ArrayList();
            String ln;
            while ((ln = br.readLine()) != null) {
                list.add(ln);
                count++;
            }
            System.out.println(count);
            br.close();
            // shuffle the lines
            Collections.shuffle(list);
            BufferedWriter bw = new BufferedWriter(new FileWriter(args[0]));
            // print the result

Iterator it = list.iterator();
            while (it.hasNext()) {
bw.write((String)it.next());
bw.newLine();

//System.out.println((String)it.next());
            }
        }
    }

[ April 17, 2002: Message edited by: Jennifer Sohl ]

You might want to add
bw.flush();
bw.close();
at the end of your program and everything should be alright

Aha. Thank you very much. Worked like a charm!