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.
Please TellTheDetails You cannot "create a servlet class file" You create a java file, compile it and the compiler generates the class files.
Tell us exactly what you were doing when you got this error. Also post the full stack trace.