import javax.swing.JComponent;

 import java.util.*;

 import java.awt.*;

 import java.awt.geom.*;

 @SuppressWarnings("serial")

 public class SketcherView extends JComponent implements Observer {

   public SketcherView(Sketcher theApp) {

     this.theApp = theApp;

   }

   // Method called by Observable object when it changes

   public void update(Observable o, Object rectangle) {

     // Code to respond to changes in the model...

   }

   // Method to draw on the view

   @Override

   public void paint(Graphics g) {

     // Temporary code...

     Graphics2D g2D = (Graphics2D)g;                                    // Get a Java 2D device context

     g2D.setPaint(Color.RED);                                           // Draw in red

     // Position width and height of first rectangle

     Point2D.Float p1 = new Point2D.Float(50.0f, 10.0f);

     float width1 = 60;

     float height1 = 80;

     // Create and draw the first rectangle

     Rectangle2D.Float rect = new Rectangle2D.Float(p1.x, p1.y, width1, height1);

     g2D.draw(rect);

     // Position width and height of second rectangle

     Point2D.Float p2 = new Point2D.Float(150.0f, 100.0f);

     float width2 = width1 + 30;

     float height2 = height1 + 40;

     // Create and draw the second rectangle

     g2D.draw(new Rectangle2D.Float(

                        (float)(p2.getX()), (float)(p2.getY()), width2, height2));

     g2D.setPaint(Color.BLUE);                                          // Draw in blue

     // Draw lines to join corresponding corners of the rectangles

     Line2D.Float line = new Line2D.Float(p1,p2);

     g2D.draw(line);

     p1.setLocation(p1.x + width1, p1.y);

     p2.setLocation(p2.x + width2, p2.y);

     g2D.draw(new Line2D.Float(p1,p2));

     p1.setLocation(p1.x, p1.y + height1);

     p2.setLocation(p2.x, p2.y + height2);

     g2D.draw(new Line2D.Float(p1,p2));

     p1.setLocation(p1.x - width1, p1.y);

     p2.setLocation(p2.x - width2, p2.y);

     g2D.draw(new Line2D.Float(p1, p2));

     g2D.drawString("Lines and rectangles", 60, 250);                   // Draw some text

   }

   private Sketcher theApp;                                             // The application object

 }