基于tcp连接的服务器端程序，接收从客户端发送的视频进行实时显示，并予以保存。可对保存的视频进行播放和删除操作。-Tcp connections based on server-side program, receiving from the client to send the video in real-time display, and to preserve. Can be saved in video playback and deletion.

JAVA语言开发的QQ聊天系统，可以添加，删除，好友，支持在线，离线发送消息，能发送文件，听音乐等功能-JAVA language development QQ chat system, you can add, delete, friends, support online, offline Send Message, can send files, listen to music and other functions