/* Listing2901.java */

import java.awt.*;
import java.awt.event.*;

class CloseableFrame
extends Frame
{
  public CloseableFrame()
  {
    this("");
  }

  public CloseableFrame(String title)
  {
    super(title);
    addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent event)
        {
          setVisible(false);
          dispose();
        }
      }
    );
  }
}

public class Listing2901
{
  public static void main(String[] args)
  {
    CloseableFrame wnd = new CloseableFrame("CloseableFrame");
    wnd.setBackground(Color.lightGray);
    wnd.setSize(300,200);
    wnd.setLocation(200,100);
    wnd.setVisible(true);
    wnd.addWindowListener(
      new WindowAdapter() {
        public void windowClosed(WindowEvent event)
        {
          System.out.println("terminating program...");
          System.exit(0);
        }
      }
    );
  }
}