This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Calling destroy doesn't do anything (other than execute any code that YOU put in your destroy method).
The init and destroy methods are callback methods that get called by the container when the servlet is either put into or taken out of service, respectively.
A better name for them might have been onInit or onDestroy.