Eclipse-like Panels: JGoodies SimpleInternalFrame
The JGoodies Looks 1.2 ship with an eclipse-like panel that you can use to structure information in your applications. It consists of a header area with icon, title and optional toolbar and has a drop shadow around the content area. See for example: http://www.jgoodies.com/freeware/validationdemo/
This class uses an API similar to JInternalFrame; its name is SimpleInternalFrame located in package com.jgoodies.uif-lite.panel that you can find in folder src/examples/demo/ of the Looks 1.2 distribution. The SimpleInternalFrame is available under the terms of the BSD open source license.
I've decided to publish this panel class just because so many people have asked for it. Anyway, I suggest to consider building your own version just to practice how to combine custom borders with panels and components.
Looks Project Home - https://looks.dev.java.net