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.
those must be of java 1.4.... if you are giving java 6 ... i am sure they have many more important things to test you on like collections,generics, console & navigablemaps & sets. i would suggest you not to focus so much on it. try and remember a few of them.