Zero length lines when reading a file

I have a JAVA (1.2) program which reads in a file, and after modifying it writes it back out to the same file name. When I run the program a second time I get a zero length record after each line. However if I open the file with an editor, modify it (e.g. add and remove a space) and then save it my program doesn't find any zero length lines. I am using:
         BufferedReader is=new BufferedReader(new
            InputStreamReader(new FileInputStream(FileName)));
    String s;
    boolean more=true;
Why is this happening?
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compare the first and second (modified) file with hex editor.

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have u tried this

instead of this

jc31415Author Commented:
I was writing my lines with +"\n\r". When I changed to +"\r", the problem was fixed.
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