How to run a Java applet on a website.

Question

Hi,
I am trying to run the code below [DrawLines.java|http://www.dgp.toronto.edu/~mjmcguff/learn/java/01-drawingLines/]
import java.applet.*;
import java.awt.*;
public class DrawingLines extends Applet {
   int width, height;
   public void init() {
      width = getSize().width;
      height = getSize().height;
      setBackground( Color.black );
   public void paint( Graphics g ) {
      g.setColor( Color.green );
      for ( int i = 0; i < 10; ++i ) {
         g.drawLine( width, height, i * width / 10, 0 );
on my website . I compiled it using JDK1.6.0_21 on Windows 7 and generated DrawingLines.class (My site is hosted on a linux server, is this an issue since it was compiled on Windows?)
I created a html file:
<applet width=300 height=300 code="/shanegibney/classes/DrawingLines.class"> </applet>Then I created a new folder called 'classes' in my public directory.
I get the following error:
java.lang.NoClassDefFoundError: /shanegibney/classes/DrawingLines (wrong name: DrawingLines)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClassCond(Unknown Source)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Exception: java.lang.NoClassDefFoundError: /shanegibney/classes/DrawingLines (wrong name: DrawingLines)I'm sure adding a java applet is very common. Does anyone have any ideas why this isn't working? It can be seen here .
Any help would be greatly appreciated,
Thanks,
Shane
Edited by: ofey on Jul 9, 2010 4:21 PM

Answer 1

I believe it's interpreting some of the code attribute as a path. Try this:
<applet width=300 height=300 codebase="/shanegibney/classes/" code="DrawingLines"> </applet>