This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The best way to find out the answer to this question is to write JSP with a method, run it, and then view the generated servlet code. Different containers will store this code in different places so you'll need to check the documentation for the one you're using.