java中，使用JFrame作为程序主窗口时，关闭程序询问当前状态是否需要存盘或者让用户确认是否真的退出等。-java, the use of class as the main program window, Close asks whether the current status or need to archive allows users to confirm whether or not really quit.

精美的Java Swing折叠菜单，完全模仿window xp左边的折叠菜单做的，拥有超炫动态效果，值得珍藏！ 解压后，在eclipse里面编译后直接运行FolderPaneDemo类。(Java Swing folding menu beautifully, folding menu completely imitate window xp left to do, with stunning dynamic effect, worthy of collection! After the d