import javax.swing.*;

/**********************************************************
 *A simple demonstration of a window constructed with Swing.
 **********************************************************/
public class FirstSwingDemo
{
    public static final int WIDTH = 300; 
    public static final int HEIGHT = 200;

    public static void main(String[] args)
    {
        JFrame myWindow = new JFrame();
        myWindow.setSize(WIDTH, HEIGHT);
        JLabel myLabel = new JLabel("Please don't click that button!");
        myWindow.getContentPane().add(myLabel);

        WindowDestroyer myListener = new WindowDestroyer();
        myWindow.addWindowListener(myListener);

        myWindow.setVisible(true); 
    }
}