java 图形界面 swing 例程 简单 易懂 希望对你们有帮助,java GUI easy swing routine you want to help

用java GUI绘制一个小球实在自由涌动，可以用键盘上下左右键控制方向，撞击物体实现消失重新绘制-Use GUI java to draw a small ball is free flowing, you can use the keyboard to control the direction of the keyboard, the impact of the object to achieve the disappearance of re drawn