posted 16 years ago
Write code. That's it. Read chapter 7 again and write code so that you understand the concepts. The key points are the inheritance order... if you can remember that Set's inherit collection then you'll remember there's and add method, and if you remember that TreeSet inherit's from SortedSet you'll remember that it's sorted and so on.
Focus on the questions at the end of the chapter, know them well. Understand the difference between <?>, <? extends ..>, and <? super ..>.
Keep reading and practicing and you'll be fine.
because .net guys can also write in java