Java developers can choose between a variety of ways incorporating Ajax, from building JavaScript into your applications "by hand" to use the new Google Web Toolkit (GWT). Ajax on Java starts with an introduction to Ajax, showing you how to write some basic applications that use client-side JavaScript to request information from a Java servlet and display it without reloading the page. It also presents several strategies for communicating between client and server, including sending raw data, and using XML or JSON (JavaScript Object Notation) for sending more complex data collection. The book then branches out into different approaches for incorporating Ajax, which include: The Prototype and script.aculo.us Javascript libraries, the Dojo and Rico libraries, and DWR ServerPages Integrating Ajax into Java (JSP) application using Ajax with Struts Integrating Ajax into Java ServerFaces (JSF) Using Google's GWT application, which offers a pure Java approach to developing web applications: your client-side component written in Java, and compiled into HTML and JavaScript Ajax gives web developers the ability to build applications that are more interactive, more dynamic, more interesting and enjoyable for your users.