android利用socket发送数据到PC，PC端也用socket接收并显示。-android using socket to send data to PC, PC-side socket is also used to receive and display.

java实现的基于TCP的聊天室程序，可以实现多人聊天，私聊，显示在线用户等功能。-java achieve TCP-based chat room procedures, you can achieve more than chat, private chat, online user display functions.