Java碰撞的小球，可运行于手机客户端的一个JAVA小程序，可用于碰撞游戏的编写，碰撞检测代码，小球在运行过程中碰撞到屏幕边缘即回弹再次运行。-Ball collision in Java can be run on a mobile client JAVA applets, can be used for collision game, collision detection code, ball to the edge of the screen that rebound again run