import javax.swing.*;
import java.awt.*;

public class SimpleWindow extends JFrame
{
	public static final int WIDTH = 300;
	public static final int HEIGHT = 200;

	public SimpleWindow()
	{
		setSize(WIDTH,HEIGHT);
		Container contentPane = getContentPane();

		JLabel label = new JLabel("You can display text using a label.");
		contentPane.add(label);

		contentPane.setBackground(Color.GREEN);
		addWindowListener(new WindowDestroyer());
	}

	public static void main(String[] args)
	{
		SimpleWindow window = new SimpleWindow();
		window.setVisible(true);
	}
}