Widgets, (sorry about the name) is a source code sample demonstrating a a few Things in Swing extensions of JTextField, and The Document class, as well as Obsever interface.
Widgets是一个源代码样例,演示了JTextField的Swing扩展,Document 类,以及Obsever接口。
来源: http://www.programmersheaven.com/zone13/cat636/29410.htm