PHP, AJAX and Java

I have a search engine which is implemented in Java. It's very complicated. I want to use a dynamic interface for the client so I guess I should go with AJAX. I absolutely don't know NOTHING about PHP, nor AJAX and this is my first web project but I have to do it ASAP and I'm seeking to learn how to do it as fast as possible. I want my page to send the query to the Java engin开发者_StackOverflowe, and after processing the Java code should return the result to the page.

Thank you for your help.

GWT (Google Web Toolkit) is probably the fastest way for a non-UI Java guy to build a complex, ajax-enabled, dynamic UI.

As it seems you are already familiar with Java, why don't you use Java Server Pages (JSP) to build the web project? Here is a guide to getting up and running.