I still get "applet not initialized" error after I using the archive="http://localhost/PluginApplet.jar"; tag in jsp:plugin.
What is the actual error? IE should provide a more descriptive error message when the pplet does not load. Try double-clicking on any strange-looking icons in IE's status bar (like the one when you get a JavaScript error).
If you're using Sun's VM (with the plug-in), you probably have a Java console running in your system tray. Check that for some kind of log, etc.
> Do I have
to setup classpath environment variable on my Windows system?
No.
Do you have any external dependencies that are not provided by the Java version you are expecting (like a strange UI library or something)? If so, you'll have to make those JAR files available to the applet by adding them to the "archive" attribute, separated by commas, like this:
<jsp:plugin type="applet"
code="PluginApplet.class"
archive="http://localhost/PluginApplet.jar,http://localhost/foo.jar";
>
</jsp:plugin>
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