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(300,300);

        setTitle(getClass().getName());

      }

   

    public static void main(String[] args)

      { CloseableFrame f = new CloseableFrame();

        f.show();

      }

  }