altering messages

Introduction: This tutorial is the twelfth in my Java Network Programming using KryoNet series, or seventh in creating a chat client and server system, in which we are going to be altering received messages and creating the login GUI for the client. Previous: In the previous tutorial we created a way to stop two clients from having the same username, therefore making all client usernames unique. 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.