This week's book giveaway is in the Raspberry Pi forum. We're giving away four copies of Getting started with Java on the Raspberry Pi and have Frank DelPorte on-line! See this thread for details.
Well thanks to all, KoKo, I also read the spec because it's very important and as for the HFEJB,it is very good to clear the concept. But As for exam, my advice is to pay special attention to MessageDrivenBean, because I found some question,hard to answer and I couldn't make good score in it.