用java实现的UFO攻击游戏，里面有代码和可执行文件，操作简单，用鼠标左键单击UFO， 每击落10架之后，就会增加一架。-used to achieve the UFO attack game, and they code and executable files, simple operation, using the left mouse button click UFO, each downed 10, will be an increase.

本程序制作模拟钢琴的实例。程序执行后，创建一个带有模拟钢琴键盘的面板，用户可以通过键盘或者鼠标来“敲击”钢琴键盘发出声音，也可以通过电脑键盘的组合键实现钢琴的高音。-This procedure produced an example of simulation of the piano. Procedures implemented, to create a simulation of the piano keyboard with a panel, the user can, through