Buffered Reader, how to make a loop to terminate

Question

Hello, the code uses each line from the input.txt and does whatever we want, it's termination condition is when the next line is null. But this fails to work if the input.txt doesn't have an emptyline after the last line, how to change the code to work for those files?
   try {
        BufferedReader in = new BufferedReader(new FileReader("input.txt"));
        String str;
        while ((str = in.readLine()) != null) {
            /*WE DO WHATEVER FOR EACH LINE HERE */
        in.close();
    } catch (IOException e) {
    }Edited by: Odinn on Jan 10, 2009 10:18 AM
Edited by: Odinn on Jan 10, 2009 10:19 AM

Answer 1

Odinn wrote:
Nop, say I have an input.txt file that contains
1
2
3
4the code above won't work files that the end line isn't empty. It works for:
1
2
3
4
<assume theres an empty line here>Edited by: Odinn on Jan 10, 2009 10:37 AM
Edited by: Odinn on Jan 10, 2009 10:38 AMAre you sure about that? Did you try to run it? If so, what happened? I just ran your code as is (just modified it to print the lines out) with two input files: One with a blank line at the end, and one without. I got the same exact output, and no error messages.
Odinn wrote:
the code uses each line from the input.txt and does whatever we want, it's termination condition is when the next line is null. But this fails to work if the input.txt doesn't have an emptyline after the last lineI don't think your logic is correct. A blank line at the end of a text file is not the same as a null, and in fact, it does not fail. If you run the code, you will see that you are not in an endless loop.