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Implement mutual exclusion with multithreading in Java

Build a Java program which simulates a communication between a server and clients.

Must use a thread to represent each party (as server or client).

Create three threads. One thread will act as a server, which always ready to receive a

message from a client (ping) and then replies the message to the same client (pong). The

other two threads will become the clients, where each client will send a message to the

server (ping) and waits for the reply (pong). Define 2 different classes to represent the

server and the client.

To perform the communication, each thread will refer to a same variable/data structure for

sending and receiving the message. Use mutual exclusion approach to ensure each client

can send and receive the reply without interruption from any other client(s).

For this simulation, the objective is to ensure that each client must successfully send 10

pings (and thus the server must successfully perform 20 pongs) and then the program can

terminate.

Example output:

Client 1 ping 1

Server pong 1 to client 1

Client 2 ping 1

Server pong 1 to client 2

Client 2 ping 2

Server pong 2 to client 2

Client 1 ping 2

Server pong 2 to client 1

...

Client 1 ping 9

Server pong 9 to client 1

Client 2 ping 9

Server pong 9 to client 2

Client 2 ping 10

Server pong 10 to client 2

Client 1 ping 10

Server pong 10 to client 1

Simulation ends