import java.awt.Frame;
import java.awt.Button;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;

class Program01 extends Frame
{
	Button button1 = new Button("Klikk");
	Program01()
	{
		addWindowListener(new WindowListener()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
			public void windowDeactivated(WindowEvent e){}
			public void windowActivated(WindowEvent e){}
			public void windowDeiconified(WindowEvent e){}
			public void windowIconified(WindowEvent e){}
			public void windowClosed(WindowEvent e){}
			public void windowOpened(WindowEvent e){}
		});
		add(button1);
		pack();
		setVisible(true);
	}
	public static void main(String args[])
	{
		new Program01();
	}
}