// From text by Cay Horstmann: Java Concepts, 2005.

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;

public class EggApplet extends Applet
{  public EggApplet()
   {  egg = new Ellipse2D.Double(0, 0, 
         EGG_WIDTH, EGG_HEIGHT);
         
      // add mouse click listener         
      MouseClickListener listener = new MouseClickListener();
      addMouseListener(listener);
   }

   public void paint(Graphics g)
   {  Graphics2D g2 = (Graphics2D)g;

      // set the background color, so user knows where to click
      setBackground(java.awt.Color.YELLOW);

      g2.draw(egg);
   }

   private Ellipse2D.Double egg;
   private static final double EGG_WIDTH = 30;
   private static final double EGG_HEIGHT = 50;


   // inner class definition

   private class MouseClickListener extends MouseAdapter
   {  public void mouseClicked(MouseEvent event)
      {  int mouseX = event.getX();
         int mouseY = event.getY();

         // now move the ellipse to (mouseX, mouseY)

         egg.setFrame(mouseX - EGG_WIDTH / 2,
            mouseY - EGG_HEIGHT / 2, EGG_WIDTH, EGG_HEIGHT);
         repaint();
      }
   }
}