Question

I have an output file for a program I have written. It is written by a FileWriter and BufferedWriter.

    FileWriter errout = new FileWriter(new File("_ErrorList.txt"));
    BufferedWriter out = new BufferedWriter(errout);

Later I write to the file using lines similar to.

    out.write("Product id:" + idin + " did not fetch any pictures.\n ");

When I simpily run the program in Eclipse, the output file is formatted correctly, with each message being written on a new line. However when I export to a .jar file, it no longer works and puts every message on a single line, as if the “\n” was not working.

Am I using the FileWriter/BufferedWriter incorrectly, or does it not work in a .jar file?

Answer 1

You should not use ‘\n’ directly. Either use out.newLine() to introduce a line break, or wrap the BufferedWriter into a PrintWriter, and use out.println().

This has nothing to do with the .jar file, anyway. More likely is Eclipse being clever and showing you line breaks, while the operating system does not.