This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
why don't you try to make your own sample? think to a real situation and try to realize it with thread. You could start, for example, to make a thread that add elements to a queue and another one that extract them...If you completed Java tutorial, you should be able to do this