Help on these topics... plz

hi all
i am giving the exam within 4 days, and still i am very weak in the following topics:
1. collections framework
2. java.awt package
3. java.io package.
plz can anyone tell me about some resources on the net where i can find questions on these topics. These topics are quite large and it is difficult to understand what to study without actually seeing questions on them. Due to other appointments i cannot postpone my exams so if anyone can help me with regards to these topics it would be great.
-AJ

Bruce Eckel's book Thinking in Java has a chapter on i/o and a little bit on awt. not sure about collections. you can download the book free of charge from www.bruceeckel.com
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I wish there was a button on my monitor to turn up the intellegince.
Theres a button called 'brightness' but it doesn't work
[This message has been edited by Brett Knapik (edited January 13, 2001).]

1. collections framework http://developer.java.sun.com/developer/onlineTraining/collections/index.html
2. java.awt package http://developer.java.sun.com/developer/onlineTraining/awt/ http://developer.java.sun.com/developer/onlineTraining/GUI/Swing1/index.html http://developer.java.sun.com/developer/onlineTraining/GUI/Swing2/index.html
3. java.io package. http://web2.java.sun.com/docs/books/tutorial/essential/index.html http://developer.java.sun.com/developer/onlineTraining/Programming/BasicJava1/index.html http://web2.java.sun.com/docs/books/tutorial/i18n/text/convertintro.html
These tutorials should help you. I once seen a summary of the IO stuff required for the exam but, can't locate it right now.

Thanx guys for the help.
will let u all know how the exam goes.
-AJ