该程序运用java实现客户端和服务器端的及时聊天，快捷方便-It help you to chat with your friend from anywhere around the world.

网络游鱼,打开Eclipse导入ch04项目，运行server.FishServer类启动服务器端，运行java client.SwimFish类启动客户端。注意，同时在多台机上运行客户端才能显示出网络游鱼的效果，在同一台机上打开多个客户端窗口不能看到该效果。-Network fish, open the Eclipse import ch04 project, run server. FishServer class start the server running Java client.