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.
I tried to be subtle with my hint to the Tomcat docs. Here is something more obvious. These are easily answered with some simple Google searches and looking at the API. Please try to find some information before asking very common questions.