animation

From: Québec (notAgain_at_enough.ca)
Date: 12/29/03 

Date: Mon, 29 Dec 2003 16:22:16 -0500

with iexplorer class not found exception

with the appletviewer, the applet from Java2 Hortsmann is started but the
image[ http://www.jeanpierredaviau.com/globe.gif ], is not shown.
--------
/**

<applet code="Animation.class" width=100 height=100>
<param name="imagename" value="globe.gif">
<param name="imagecount" value="36">
</applet>
 * @version 1.20 1999-04-23
 * @author Cay Horstmann
 */

import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;

public class Animation extends JApplet
   implements Runnable
{ public void init()
   { addMouseListener(new MouseAdapter()
         { public void mousePressed(MouseEvent evt)
            { if (runner == null)
                  start();
               else
                  stop();
            }
         });

      try
      { imageName = getParameter("imagename");
         if (imageName == null) imageName = "";

         imageCount = 1;
         String param = getParameter("imagecount");
         if (param != null)
            imageCount = Integer.parseInt(param);
      }
      catch (Exception e)
      { showStatus("Error: " + e);
      }

      current = 0;
      image = null;
      loadImage();
   }

   public void loadImage()
   { try
      { URL url = new URL(getDocumentBase(), imageName);
         image = getImage(url);
         MediaTracker tracker = new MediaTracker(this);
         tracker.addImage(image, 0);
         tracker.waitForID(0);
         imageWidth = image.getWidth(null);
         imageHeight = image.getHeight(null);
         resize(imageWidth, imageHeight / imageCount);
      }
      catch (InterruptedException e)
         // thrown by MediaTracker.waitFor
      { showStatus("Loading interrupted");
      }
      catch(MalformedURLException e)
      { showStatus("Bad URL");
      }
   }

   public void paintComponent(Graphics g)
   { if (image == null) return;
      g.drawImage(image, 0, - (imageHeight / imageCount)
         * current, null);
   }

   public void start()
   { runner = new Thread(this);
      runner.start();
      showStatus("Click to stop");
   }

   public void stop()
   { runner.interrupt();
      runner = null;
      showStatus("Click to restart");
   }

   public void run()
   { try
      { while (!Thread.interrupted())
         { repaint();
            current = (current + 1) % imageCount;
            Thread.sleep(200);
         }
      }
      catch(InterruptedException e) {}
   }

   private Image image;
   private int current;
   private int imageCount;
   private int imageWidth;
   private int imageHeight;
   private String imageName;
   private Thread runner;
}

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