坦克大战的简陋单机版，能够四处移动 能够打击敌人，敌人能够移动，能够模拟爆炸，能够产生障碍，能够增长生命。通过这个小程序熟悉j2se的使用，初步掌握面向对象编程的基本思想。 -Battle City for simple stand-alone version that can move around to attack the enemy, the enemy can move, to simulate the explosion, to create an obstacle to g