// Stolen from CoreJava
import java.awt.*;
import java.awt.event.*;

public class CloseableFrame extends Frame {
    public CloseableFrame () {
	addWindowListener (new WindowAdapter () {
		public void windowClosing (WindowEvent e) {
		    System.exit(0);
		}
	    });
	setSize (300, 200);
	setTitle (getClass().getName());
    }
}