1.基于java线程的坦克大战小游戏 2.多重地图，多重关卡 3.利用文件读取改变地图属性，坦克属性等 4.利用绘图技术，重绘地图。(tank war games based on Java threads 2. multiple maps, multiple levels 3. use file read to change map attributes, tank attributes, etc.)