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.
Madhu, if you closely follow what Marc wrote: Follow Marc's link and look for the tab labelled Previous Releases. Click on it and you go to a page where you can download older versions of the JDK: 5.0, 1.4.2, 1.3.1.