How do I program a neural network from scratch using Java?

There are many implementations of neural networks... What will you be using it for? I wrote a fairly simple one in college in Java just using basic data types. Can you give me some more info?

This site has an applet which may be useful... possibly a little complex. (there is a link to the source):
http://fbim.fh-regensburg.de/~saj39122/jfroehl/diplom/e-index.html

I'm looking to compare 2 different NN architectures, namely radial basis function and feed forward (or plain multilayer perceptron), in its ability to distinguish cheaters on a memory test. A textbook with code examples would be useful to me.

I also posted this question on metafilter (http://tinyurl.com/295pav).

Interesting. For good textbooks, I've had success using Amazon (especially reading their user reviews). Perhaps "Introduction to Neural Networks with Java" (http://tinyurl.com/2u23cy) would be useful.

I've visited Jeff Heaton's website. My fear is that his text is written completely around his JOONE framework. BUT, you gave me a good idea. I think I'll ask my local Barnes and Noble if they can order the book for me so I can look through it, prior to purchase.