This book will show Java developers how to use the Google Web Toolkit (GWT) to rapidly create rich web-based applications using their existing skills. It will cover the full development cycle, from setting up your development environment, to building the application, then deploying it to the web server. The entire core GWT library will be discussed, with details and examples on how it can be extended. The Web is experiencing a new and exciting growth, with a strong emphasis on rich web-based applications. These applications suffer from being difficult to build because they require knowledge of numerous browser incompatibilities, are difficult to debug, and require the use of JavaScript, a language which lacks sophisticated object-oriented structures and static typing. GWT overcomes these shortcomings by bringing rich web-clients to Java. This book will show Java developers how to take advantage of this exciting new technology, and allow them to build the next generation of rich web-based applications.