Question

My teacher showed us code to implement an application server multithread but I am a little bit confused. is this an implementation of a multithread server? I didn’t understand if it’s so.
We suppose to create an object Server s = new Server(port_number). Could we assert it is a multithread server ?

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

public class Server implements Runnable
{
private ServerSocket serverSocket;

public MainCenterServer(int port){

    try
    {

        this.serverSocket = new ServerSocket(port);
    }
    catch(IOException ioe) {ioe.printStackTrace(); }

    new Thread(this, "Server").start();
}

@Override
public void run()
{

    while(true)
    {
        try
        {
            Socket socket = serverSocket.accept();

        }
        catch(IOException ioe) {ioe.printStackTrace(); }

    }
}   
}

Answer 1

By your definition of a multithreaded server, yes, this server is multithreaded.

new Thread(this, "Server").start() creates a separate thread for the run() method to execute on. Since the run method has an infinite loop, it will always be waiting for a client to accept (Socket socket = serverSocket.accept()).