GWT 2.2 Tutorial and Developer Guide

Developer's Guide

Welcome to the Google Web Toolkit Developer's Guide. This guide introduces

the key concepts, tools, and libraries you'll encounter when building web

applications with GWT. The topics in this guide span project organization, coding,

debugging, testing, optimizing, and publishing your web application.

Note - If you're new to GWT and eager to start playing immediately, you might

want to try the Quick Start. For specific technical details, see

the Reference guide and Articles.

Tutorials

GWT application into another language

4. Unit testing with JUnit – Add unit tests to a GWT application using JUnit

5. Deploying to Google App Engine – Deploy a GWT application to App

Engine

Developer Guide

1. What's New in 2.2?

2. Organize Projects – Describes conventions to identify which code is

intended to run on the client browser, the server, or both

3. Compile & Debug – Describes development and production modes

4. Coding Basics – Describes GWT programming fundamentals

7. MVP Framework

2.1

– Sample app and documentation showing how to use

Activities, Places, and the EventBus.

8. RequestFactory

RequestFactory and EntityProxy classes.

9. Logging

applications.

10. Accessibility – Describes features that enable screen readers to interpret

Emma code coverage tool

14. Deploy – Describes how to deploy both client- and server-side JavaScript

15. Optimize – Describes how to improve the performance of your application

16. Reference – Provides javadoc for GWT and related libraries and technical

details for GWT widgets

17. FAQ – Frequently asked questions

18. Glossary – GWT terminology

Get Started with the GWT SDK

Prerequisites

If you have problems running Ant on the Mac, try setting the $JDK_HOME

environment variable with export JDK_HOME="/Library/Java/Home"

Download and Install the GWT SDK

On Windows, extract the files from the compressed folder gwt-2.2.0.zip. On Mac

or Linux, you can unpack the package with a command like:

The GWT SDK doesn't have an installer application. All the files you need to run

and use the SDK are located in the extracted directory.

Create your first web application

This command starts GWT's development mode server, a local server used for

development and debugging, as follows:

Launch the local server in a browser by either 1) clicking "Launch Default

Browser" or 2) clicking "Copy to Clipboard" (to copy its URL), then pasting into

Firefox, Internet Explorer, Chrome, or Safari. Since this is your first time hitting

the development mode server, it will prompt you to install the Google Web Toolkit

Make a few changes

The source code for the starter application is in the MyWebApp/src/ subdirectory,

where MyWebApp is the name you gave to the project above. You'll see two

packages, com.mycompany.mywebapp.client and com.mycompany.mywebapp.server.

Inside the client package is code that will eventually be compiled to JavaScript

and run as client code in the browser. The java files in the server package will be

Engine servers.

Look inside com/mycompany/mywebapp/client/MyWebApp.java. Line 41 constructs the

"Send" button.

compile the application by executing: