马士兵坦克大战修改版本，添加背景，音乐，还有双人模式，使用到了很多java的重要知识，如绘图，线程，定时器，键盘响应等。-Mashi Bing Tankedaizhan version modify, add background music, there is a two-player mode, use a lot of java knowledge, such as drawing, thread, timer, keyboard response.