Google Web Toolkit: Ajax Apps from Java
- Use your favorite Java IDE to write and debug an application in the Java language, using as many (or as few) GWT libraries as you find useful.
- Confirm that your application works in each browser that you want to support, which usually takes no additional work.
A widget like tree has methods to manipulate the structure (e.g. addItem()) and event handlers (e.g. addFocusListener).