I'd like to update my skills as I am certified in 1.4 and am now working in a Java 5 environment. The Sun eduction site recommends sitting the new Java 6 exam, but I have no idea how to go about revising for the upgrade exam. Do I get a Java 5 book and look up the extra Java 6 bits, or just start with Java 6? Are there a lot of differences between the versions? In the upgrade exam will I only be tested on these differences, or everything? Basically, do I need to read about what a for loop is for the millionth time?
I've used the targeted books (Head First) for my SCJP and SCWCD exams and am not looking forward to doing it on my own if that's the only option for me.
I can't afford the recommended Java 5 (not even 6) course the training guys told me to do at �1500 so a book or online would be my method.