On your way in you may have missed that JavaRanch has a policy on display names, and yours does not comply with it - please adjust it accordingly, which you can do right here. Thanks for your prompt attention to this matter.
Enjoy your time here.
Joined: Mar 22, 2005
As to your question, I don't know what "class file maintenance" means, but you can find some pointers about applet-to-servlet communication here.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com