Catching window closing events from JFrame

Question

I'm having problems catching windowClosing() events from a JFrame (just doesn't get to my event listener it would seem!).
I register and setup a window listener in the constructor of my JFrame class. Prior to this I set the default close operation as DO_NOTHING_ON_CLOSE (as you're suppose to if tyou want to handle window closing events).
When user clicks on x (window terminate) button (in WIN systems), nothing is dispatched to my event listener. Any ideas?
Extract from constructor:
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
addWindowListener(new MainWindowListener(this));
MainWindowListener looks as follows (EDImemConvert extends JFrame):
class MainWindowListener extends WindowAdapter
private EDImemConvert f;
public MainWindowListener(EDImemConvert f)
this.f = f;
public void windowClosing(WindowEvent e)
System.out.println("gets here...");
f.ReturnResources();
f.dispose();
System.exit(0);
}

Answer 1

This works for meimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
  public Test() {
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent we) { System.exit(0); }
    setSize(300,300);
    setVisible(true);
  public static void main(String args[]) { new Test(); }
}Normally, I just use this line
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
instead of adding a listener. It will clean up everything nicely.