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


public class ClosableFrame extends Frame implements WindowListener {

  public ClosableFrame() {
    addWindowListener(this);
  }
  
  public ClosableFrame(String s) {
    super(s);
    addWindowListener(this);
  }
  
  public void windowClosing(WindowEvent e) {
    setVisible(false);
  }
  
  public void windowOpened(WindowEvent e) {}
  public void windowClosed(WindowEvent e) {}
  public void windowIconified(WindowEvent e) {}
  public void windowDeiconified(WindowEvent e) {}
  public void windowActivated(WindowEvent e) {}
  public void windowDeactivated(WindowEvent e) {}

}