java.net: Creating JSF Custom Components

java.net: Creating JSF Custom Components: "This article illustrates how to build custom components for use in web applications based on JavaServer Faces (JSF). While JSF comes with a standard set of components, one of the most-publicized features is the easy addition of new components. In this article, you will see just how easy it is to create new components that are fully functional and integrated into your web applications. Specifically, this article will show how to develop a component that allows users to enter valid credit card numbers. "