JDemo is the Java demonstration framework. Its concept is similar to the one of JUnit.
As supplement to test driven software development, JDemo provides a new approach of
demo driven development:
When developing software, you write short code snippets (demo cases) that use your new API. The demo
then demonstrates both: how to use the API and what happens when you execute the code.
So you can for example interactively test the usability of GUI components.
JDemo has a lot of convenience classes and methods that make implementing those
demos very easy. The demos can then be launched from a Swing application called Demo Runner.
Demos can also be used for automatically taking screenshots for documentation purposes.