java简易聊天室*本程序为大四TCP/IP实验课要求编写的聊天程序*可以进行简单的聊天，并具有私聊的功能*支持多用户*上下线提醒*在线列表等简单功能*程序代码只有2个文件，超简单，初学必备-java chat room* Simple procedures for the senior TCP/IP experiment request of the Chat Program* for a simple chat, and Private Chat with the functional multi-user support*** Linear remind online links and other simple functions* code only two text pieces, super-simple, beginner essential