This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
J2SE 5.0 (better known as Java SE 5.0) is version 5.0 of Java. Since it's release we've already seen Java SE 6 (with latest version Java SE 6u29), and since this summer Java SE 7. It has already seen one update, so the Java SE 7u1 is indeed just a very more recent version of Java SE 5.0. It adds several new classes in the API, and even a few extra language enhancements; the ability to use Strings in switch statements and the try-with-resources structure are my favourites.