This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Raj, we really do like helping. But your questions are too open ended and would require a full semester of posts to answers them. Try breaking your questions down to smaller simpler questions so we can help.