import javax.swing.JFrame;
import java.awt.event.WindowStateListener;
import java.awt.event.WindowEvent;
class Program01 extends JFrame
{
	Program01()
	{
		addWindowStateListener(new WindowStateListener()
		{
			public void windowStateChanged(WindowEvent e)
			{
				windowStateListener(e);
			}
		});
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(800, 600);
		setVisible(true);
	}
	private void windowStateListener(WindowEvent e)
	{
		if(e.getNewState()==WindowEvent.WINDOW_CLOSED)
		{
			//ide jön a mentés
		}
	}
	public static void main(String[] args)
	{
		new Program01();
	}
}