This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
you have to buy it , you can get the materials for free from their site also.
If you wanna do data structures specially in Java. I think It doesn't get better than this. Even I am studying it right now, M in 5 th chapter
This book might be a bit heavy for you. In that case just do a tutorial in Collections classes from the net. You will find plenty.
A TubeBulb May light slowely... But it lights the Brightest..