java版本的坦克大战项目，用于熟悉j2se项目 该项目是网络版本的坦克大战。内容很简单，使用了工厂模式。采用udp传输消息。-java version of the Battle City project, for the familiar j2se project The project is the network version of the Battle City. Very simple, use the factory pattern. Transfer by udp mess