This is a Java program we made as an assignment part of the Big Data course I took in university. It uses Socket connection to input two matrices from two clients into a server and multiplies them. You can run the Server and Clients locally on the same device or run them on different devices in the same network.

• If you are running Server and Clients on different devices you need to obtain the IP address of the Server device. Open the terminal on the Server device and execute:

  • On Linux: hostname -I

  • On Mac: ipconfig getifaddr en0 (en0 for wireless,en1 for wired connection)

• Otherwise, if you are running Server and Clients on the same device, then the Server's IP address will be localhost

Then proceed with the steps:

1. Open Server.java file and change this line to choose the port you want to open a ServerSocket on (you can also leave it as 1233)

ServerSocket serverSocket = new ServerSocket(1233);

2. Open Client1.java and Client2.java files and modify this line to use the port you specified in the Server file and the IP address of the server you obtained

Socket socket = new Socket("localhost", 1233);

3. Run Server.java and your console should print Listening for client 1, then run Client1.java and you should see the first matrix printed on the server's console, then run Client2.java and the second matrix should be printed then the multiplication result.