Name: paC48320 Date: 09/15/97


To reproduce the problem:
  Run the following program. I would expect it to stop on exit from Main.main, but it doesn't.


import java.awt.*;

public final class Main
{
  public static void main(String[] arguments)
    {
      Frame frame = new Frame(); /* Note that I do not show this frame */
      FileDialog dlg = new FileDialog(frame, "Load File", FileDialog.LOAD);
      dlg.show();
      System.out.println("Directory name : " + dlg.getDirectory() +
        System.getProperty("line.separator") +
        "File name: " + dlg.getFile());
      dlg.dispose(); /* Just to make sure... */
      frame.dispose();
      dlg=null; /* Let's be really sure... */
      frame=null;
      System.gc(); /* This should be enough... */
    } /* But NO!!! The program does not exit!!!! */
}

If you investigate further, you will notice that the AWT creates an internal thread but it doesn't flag it as a deamon thread. This is why the application remains suspended.

This thread should be made a deamon, because it is really specific to the implementation of the AWT.
The JLS says that a program exits as soon as all non deamon threads are dead. This problem prevents this from happening (from a programmer's perspective).

company - ACAPS research team , email - ###@###.###
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