能实现通讯录的管理,能很方便的进行用户的查询，添加，删除，修改等操作！-To achieve the management of contacts, can be very convenient for the user' s query, add, delete, modify, such as the operation!

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