POJ - NetBeans IDE 5.0 HTML Editor Tutorial

This tutorial demonstrates how to build an HTML editor, without any Java coding whatsoever. The HTML editor that you create is a rich-client application built "on top of the NetBeans Platform". What this means is that the core of the IDE, which is what the NetBeans Platform is, will be the base of your application. On top of the NetBeans Platform, you add the plug-in modules that you need and exclude the ones that the IDE needs but that your application doesn't.
http://platform.netbeans.org/tutorials/nbm-htmleditor.html