Ajax in Action is a good general book on the subject, thought its examples are a bit dated.
If you want to use jQuery to do your Ajax, my book jQuery in Action has enough info in chapter 8 to get you going.
There are a number of books devoted to using Ajax with PHP, but I'm not sure of any that focus exclusively on Java. JQuery in Action uses Java and JSP as its server-side language.
But to be honest, to just learn the client side of Ajax, the server side isn't all that important.
Are you just tying to learn how to use Ajax, or how to write Java on the server to handle Ajax? If the latter, requests are handled in the same way -- what changes is what is returned as the response (for example, JSON or HTML fragments rather than full HTML pages).
Joined: May 22, 2012
yes, was wondering if there is a big difference using java, PHP or other technologies.