title: How to ban a client in client_server chat in java
body: <p>I have implemented Client_server chat in java, all in my code work nice but I need to add a new  feature that allow different privilege levels for users, normal users and super users. Super users have the ability to ban other users permanently from further conversations by sending a special message to the server. <strong>How should I do to ban a user.</strong>
   I have server class, Client class and chat class.The code is very long but it is similar to this link code, 
  <a href="https://github.com/abhi195/Chat-Server" rel="nofollow noreferrer">https://github.com/abhi195/Chat-Server</a>
  Help please!
  Thank you for hand!</p>