It's the book that I think most people around here are using:
Kathy Sierra & Bert Bates "Sun Certified Programmer & Developer for
Java 2 Study Guide" from Osborne Certification press.
Here's a link to it so you can see what it looks like (you can get it any number of other places):
http://www.bookpool.com/sm/0072226846 Look, don't fool around. If you're prepping for the
test, which you obviously seem to be, get the book. Best programming review book I've seen. I'm also studying for .NET certifications, and, OMG, MS people need to emulate this format for their own review books, which really are god-awful.