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.
using ajax is not the major task in java , main idea of ajax is the send the request to the without refresh the page , but at server side there is nothing to worry about , because ajax request same a normal request the servlet and jsp handle these ajax request as a normal request . so just read about java servlet and jsp and ajax , there are several online tutorial.