In Simple Chat, if the server shuts down while a client
is connected, the client does not respond, and continues to wait
for messages. Modify the client so that it responds to the shutdown
of server by printing a message saying the server has shut down,
and quitting. (look at the methods called connectionClosed and
connectionException).
//ChatClient.java
// This file contains material supporting section 3.7 of the textbook:
// "Object Oriented Software Engineering" and is issued under the open-source
//...