Welcome to JavaRanch.
In order to help folks get the most out of these forums, we have put together a page with plenty of good advice:
HowToAskQuestionsOnJavaRanch. You might want to start with
PatienceIsAVirtue,
UseTheForumNotEmail and
KeepItDown.
As to your question, we have a very extensive
SCJP FAQ, which answers all kinds of questions, and links to much useful material.
[ July 03, 2007: Message edited by: Ulf Dittmer ]