Chat Client - Server Java
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Client-Server application in Java
It's a chat client-server application written in java that implements the following commands:
LIST - list the users connected to the server
MSG - sends a private message to a selected user
BCAST - sends a message to all users connected
NICK - changes the username of the current user to the one selected
QUIT - deconnects the user

Rules
two users connected to the server can not have the same nickname
errors such as "user does not exist" are properly handled