This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I used them. Well worth the purchase but the software can be slightly buggy. There are also some interfaces and API methods thrown into the questions that you will NOT find on the real SCJP exam. Best regards and good luck with the study!