JOptionPane hangs console app

Question

I'm having some trouble with JOptionPane. Yesterday I posted about this, but the post disappeared.
On Win2000, j2sdk 1.4.2-b28, the following program never ends:
import javax.swing.*;
class test1
     public static void main(String[] args)
          int result = JOptionPane.showConfirmDialog(null, "choose one", "choose one", JOptionPane.YES_NO_OPTION);
          System.out.println("Result of button push = " + result);
          return;
The dialog disappears and it prints the results of the button push, but the program never exits.
I tried to put the JOptionPane on the event thread
import javax.swing.*;
class test
     public static void main(String[] args)
          //Schedule a job for the event-dispatching thread:
          //creating and showing this application's GUI.
          javax.swing.SwingUtilities.invokeLater(new Runnable()
               public void run() { createAndShowGUI(); }
     public static void createAndShowGUI()
          int result = JOptionPane.showConfirmDialog(null, "choose one", "choose one", JOptionPane.YES_NO_OPTION);
          System.out.println("Result of button push = " + result);
          return;
but this shows the same behaviour.
I'm having related problems when invoking JOptionPane in Jython: there the dialog never appears.
Thanks for any help!
Gerry

Answer 1

import javax.swing.*;
class test
public static void main(String[] args)
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable()
public void run() { createAndShowGUI(); }
public static void createAndShowGUI()
int result = JOptionPane.showConfirmDialog(null, "choose one", "choose one", JOptionPane.YES_NO_OPTION);
System.out.println("Result of button push = " + result);
if(result == JOptionPane.YES_OPTION)
          System.exit(0);
return;
}