import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class G2d extends Frame {

    public G2d(){
        super("My window");
        prepareGUI();
    }

    public static void main(String[] args){
        G2d g2d = new G2d();
        g2d.setVisible(true);
    }

    private void prepareGUI(){
        setSize(400,400);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent){
                System.exit(0);
            }
        });
    }

    @Override
    public void paint(Graphics g) {
        // TODO draw picture
    }

}