These questions are very useful for some Java newbies and guys who wanna prepare some interviews on Java programming positions, which is really cool.

reference:
http://www.allapplabs.com/interview_questions/java_interview_questions.htm
http://www.allapplabs.com/interview_questions/java_interview_questions_2.htm
http://www.allapplabs.com/interview_questions/java_interview_questions_3.htm
http://www.allapplabs.com/interview_questions/java_interview_questions_4.htm
http://www.allapplabs.com/interview_questions/java_interview_questions_5.htm
http://www.allapplabs.com/interview_questions/java_interview_questions_6.htm