java组播实现聊天室 着是一个利用MulticastSocket技术实现的网络聊天室-achieve chat rooms with the use of a technology MulticastSocket network Chat Room

一个组播的例子，可加入组播，发送接收信息,测试成功.-a multicast example, may include multicast, sending receiving information, testing success.

实现局域网内的组播功能，在同一个组同一个端口内的所有主机都可以收到发出的组播消息。-Within a LAN multicast function in the same group with all the hosts within a port can receive the multicast message.