This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
I do not mean to sound rude or anything, but I have been noticing you are posting a lot of "what is..." and "how to..." type questions. Of course this would mean you are very keen on learning new stuff. However it might be a good idea to read http://faq.javaranch.com/java/SearchFirst