import javax.swing.*;

/**********************
 *A simple window class.
 **********************/
public class FirstWindow extends JFrame
{
    public static final int WIDTH = 300; 
    public static final int HEIGHT = 200;

    public FirstWindow()
    {
        super();

        setSize(WIDTH, HEIGHT);
        JLabel myLabel = new JLabel("Please don't click that button!");
        getContentPane().add(myLabel);

        WindowDestroyer listener = new WindowDestroyer();
        addWindowListener(listener);
    }
}