实现了坦克的基本移动和旋转，周围设置有围栏，可以挡住坦克的移动，这可以作为J2me游戏的基本研究下吧-The basic implementation of the tank movement and rotation, there is fencing around the set, you can block the movement of tanks, which can be used as the basic research J2me Games, are you
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