Embed Java applets on Google Sites

I am trying to run some Java code that I wrote on the Google site I created. I know the problem is with this, but I tried both of the following options:

• Use of the Code Wrapper gadget, as described here: http://web.michaelchughes.com/how-to/embed-java-applets-in-google-sites . I used the Code Wrapper gadget with the following URL: http://hosting.gmodules.com/ig/gadgets/file/105629041657992777031/code-wrapper.xml with the following Javascript code:

  <script type="text/javascript" src="http://www.java.com/js/deployJava.js"></script>
  
  <script type="text/javascript">
      /* <![CDATA[ */
          var attributes = {
              code: 'com.fusego.wimbeep.applet.ScreamURLApplet.class',
              archive: 'http://sites.google.com/site/wimbeep/technology/wimbeeptools.jar',
              width: 500,
              height: 100
          };
            var parameters = { };
            var version = '1.6';
            deployJava.runApplet(attributes, parameters, version);
      /* ]]> */
  </script>   
  

This does not work. I open the debug console in my Firefox browser and I see that deployJava is undefined.

• Using the built-in gadget with tags:

  < _applet archive = "http://sites.google.com/site/wimbeep/technology/wimbeeptools.jar" code = "com.fusego.wimbeep.applet.ScreamURLApplet.class" height = "400" width = "400" /" >

. , JRE , , :

load: class com.fusego.wimbeep.applet.ScreamURLApplet.class not found.
java.lang.ClassNotFoundException: com.fusego.wimbeep.applet.ScreamURLApplet.class
    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.ClassNotFoundException: com.fusego.wimbeep.applet.ScreamURLApplet.class

. .class postfix , . ?