Broadcaster Servers and Chat Servers.

• Lecture: Broadcaster Servers and Chat Servers.
• Lab: Study broadcaster.java. Adapt it in the same way that you adapted the echoServer last week.
• Adapt it so that it allows exactly two clients to chat.
• Adapt it so it allow arbitrarily many pairs of clients to chat. (answer - chatServer.java).
• Think about how to add a username and let the client choose who to chat to. Implement it (non-compulsory exercise).

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