Hi, all
Some of my experiences are overlapped with other guys. I think you could check their news. Something special for me is:
1)Pay attention to exception. many people said that "the threads" is very difficult, but indeed I got the lowest part in my "exception". For threads, I think you just make clear what is the theory and do some mocks to practice, it is OK. For exception, maybe you need some "real coding experience" because you have to deal with runtime exception as well as checked exception.
2)the basic concepts like inner class, constructors, garbage collection,... you should make them 100% clear to yourself because some statement items are very puzzling if you are not 100% confident on these basic concepts.
3)Usually the code is 8-15 lines, and only one or two reach 30 lines. Skipping the difficult one is a good idea, some time maybe you will find some hints from the later part of the exam.
Hope these helpful.
Cheers