How do I put my Java program online as an applet?

Hello, I created a projectile simulation Java application for my final
project in AP Java. I was really excited with the final result and
decided I wanted to post it online. How in the world do I do that?
Ideally I would either like to post it to a blog (.blogspot.com) or a
Google Page (.googlepages.com). I have absolutely no idea how to do
it and what to do, all I have is the program that is broken down into
several classes. If you don't know how to get it on a blog or google
page, is there somewhere else I can post it for free? Any help at all
would be appreciated, Thanks for your time! P.S. I used JCreator if
that helps any.

.