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Introduction: This tutorial is the nineteenth in my Java Network Programming using KryoNet series, or fourteenth in creating a chat client and server system, in which we are going to be continuing the previous tutorial. Previous: In the previous tutorial we added private message features to the client. The System: We are going to give the user a GUI to interact with the system - to send messages and see the currently connected members of the chat. When a client connects, add them to a list. Send incoming messages to everyone within the clien