Multiple client to server communication program in Java

Question

I wrote a server-client communication program and it worked well.

Client module

import java.io.*;
import java.net.*;

class Client {
    public sta         


        

Answer 1

MainServer class

public class Server {

    public static void main(String[] args) throws IOException {

        ServerSocket serverSocket = null;

        boolean listeningSocket = true;
        try {
            serverSocket = new ServerSocket(2343);
        } catch (IOException e) {
            System.err.println("Could not listen on port: 2343");
        }

        while(listeningSocket){
            Socket clientSocket = serverSocket.accept();
            MiniServer mini = new MiniServer(clientSocket);
            mini.start();
        }
        serverSocket.close();       
    }

}

Helper Class

public class MiniServer extends Thread{

    private Socket socket = null;

    public MiniServer(Socket socket) {

        super("MiniServer");
        this.socket = socket;

    }

    public void run(){
            //Read input and process here
    }
            //implement your methods here

}

Answer 2

Well, when I do something like that, I implement a listener that manages the server side, so when a client (the client won't probably need changes) connects, the server launch one thread to work with that client.

while (!stop)
            {
                socket = serverSocket.accept();
                HiloSocket hiloSocket = new HiloSocket(socket, this);
                hiloSocket.start();
            }

Of course, HiloSocket extends Thread and it has the logic behind to manage the client...

Answer 3

You want to look into Java concurrency. That's the concept of one Java program doing multiple things at once. At a high level you will be taking your while(true) { //... } block and running it as part of the run() method of a class implementing Runnable. You'll create instances of Thread that invoke that run() method, probably one per client you expect.

For a really good, deep understanding of all that Java offers when it comes to concurrency, check out Java Concurrency in Practice.