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.
Compiling a servlet is nothing different than compiling a plain Java class.
So the answer to you question depends on how are compiling the servlet?
Do you use Ant? Any editor like Eclipse? Hand compile through command line?
You need to TellTheDetails.