Resources for learning about Threading

I've spent the last year learning and using Java in 开发者_Python百科university but we didn't do much (read: anything) in terms of Threading.

We do some next year but I'm hopeful I'll be able to get a head start over the summer.

What are the best resources for learning about and getting to grips with Threading?

Take a look at Java Concurrency in Practice

Take a look this program: http://javaconcurrenta.sourceforge.net/

with this program you learn visually java threads.