If you're just getting started, you should check out the tutorials. If you're looking for information on specific widgets or features, consult the reference manual and widget gallery. Check our Redmine for forums, issues, and wiki.


Introduction and tutorials

Check out the user guide for an introduction to JWt.

Reference Manual

Use the reference documentation to see which classes and functions are included in JWt and how they should be used.


Widget Gallery

The widget gallery showcases most widgets available in JWt, with the source code to accomplish these examples. It's a good way to see what JWt has to offer and to get a feel for how these features can be used.


Choose an example:

Simple chat

This example implements a simple chat client and server. Using server-initiated updates, you can easily push events from one user to other users. Server-initiated updates are implemented using Ajax long polling.

When deploying in a Servlet-3.0 container, you can enable its asynchronous processing and JWt will benefit from this to not tie up threads for each open connection. But you can also deploy the application on a Servlet-2.5 container, reverting to blocking threads. This may be convenient when a Servlet-3.0 container is not available, e.g. during development.

It also illustrates nice benefits of a class-based approach to web application development: you can easily instantiate the same widget class multiple times. The SimpleChatClient widget may be reused just as you reuse basic JWt widgets such as a push button.

Interactive applications like these, which allow users to post HTML text to other users, are notorious for cross-site-scripting (XSS) attacks: a user enters malicious (javascript) code as part of his message. When another user renders this message, it may transmit unwanted private information retrieved from, for example, browser cookies. JWt prevents such attacks completely, and without any responsibility to the developer, since widgets such as WText ensure that what is displayed is only passive text, discarding anything that is not strictly text.