This is the official documentation for Google Web Toolkit Version 1.4. Note that version 1.4 is no longer the current one. You may wish to take a look at the main GWT page if you're not sure how to proceed.

Developer's Guide

Writing web apps today is a tedious and error-prone process. Developers can spend 90% of their time working around browser quirks. In addition, building, reusing, and maintaining large JavaScript code bases and AJAX components can be difficult and fragile. Google Web Toolkit (GWT) eases this burden by allowing developers to quickly build and maintain complex yet highly performant JavaScript front-end applications in the Java programming language.

The topics presented below provide comprehensive coverage of GWT from many different angles. For new comers, there are tutorials to get you started, FAQs covering many of those very early questions and a glossary to highlight important terminology. For more experienced GWT developers, the API Reference is one that you will surely want to bookmark and the Developer Guide delves very deeply into many advanced topics that will help you make the most of GWT. Also, for those who are simply trying to understand what GWT offers, this guide offers a wonderful way to get a view of the available features that goes well beyond bullet points.