使用一个类来自定义一个面板加载背景图片的源代码，下载就课运行-The use of a class from the definition of a panel to load the background picture of the source code, download the lesson to run

这是学习J2SE的视频，是自己在网上下载的。应该会初学者用得上。-This is a video learning J2SE, is their online download. Beginners should need them.

java课件，学习java不再是难事，轻松学java，请下载它。-leaning java is not a difficult thing at all.The lesson will help you lean java.please download it.you can study it very easily.it include many information