这个实例实现了加入和离开组播组、在组播组中发送及接收数据、利用组播实现时间服务器、利用组播实现网络教学功能-this example realized join and leave multicast group, the multicast group to send and receive data and the use of time-servers multicast using multicast network teaching function

Java网络编程演示，用于北京师范大学计算机系Java课程教学示范。-Java Network Programming demonstration for the Computer Science Department of Beijing Normal University Teaching Java model.