AWTHomework2b

package awtHomework2b;
import java.awt.*;
import java.awt.event.*;

class GraphicsPanel extends Panel {
    public void paint( Graphics g ) {
        g.setColor( Color.blue );
        g.fillRect( 10, 10, 300, 300);
        g.setColor( getBackground());
        g.fillRoundRect(25, 25, 270, 270, 20, 20);
        g.setColor( Color.red );
        g.fillRect( 40, 40, 120, 120 );
        g.setColor( Color.blue );
        g.fillOval( 40, 40, 240, 240 );
        g.setColor( getBackground());
        g.fillArc( 40, 40, 240, 240, 90, 90);
    }
}

public class AWTHomework2b extends Frame {

    public AWTHomework2b() {
        GraphicsPanel gp = new GraphicsPanel();
        this.setTitle("GraphicsDemo");
        this.setSize(340,360);
        this.add( gp );
        this.setVisible(true);
        this.addWindowListener( new WindowClosing());
    }

    public static void main(String[] args) {
        new AWTHomework2b();
    }

    class WindowClosing extends WindowAdapter {
        public void windowClosing( WindowEvent e) {
            System.exit(0);
        }
    }
}