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
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java组播编程实例 WhiteBoard time SendAndRecieveData join-leaveMulticastGroup
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