Program MultiThreadChatServer.java

import java.io.*;

import java.net.*;

public class MultiThreadChatServer{

    // Declaration section:

    // declare a server socket and a client socket for the server

    // declare an input and an output stream

    static  Socket clientSocket = null;

    static  ServerSocket serverSocket = null;

    // This chat server can accept up to 10 clients' connections

    static  clientThread t[] = new clientThread[10];

    public static void main(String args[]) {

    // The default port

    int port_number=2212;

    if (args.length < 1)

        {

        System.out.println("Usage: java  MultiThreadChatServer \n"+   "Port yang sedang digunakan="+port_number);

        } else {

        port_number=Integer.valueOf(args[0]).intValue();

        }

        try {

        serverSocket = new ServerSocket(port_number);

        }

        catch (IOException e)

        {System.out.println(e);}

    while(true){

        try {

        clientSocket = serverSocket.accept();

        for(int i=0; i<=9; i++){

            if(t[i]==null)

            {

                (t[i] = new clientThread(clientSocket,t)).start();

                break;

            }

        }

        }

        catch (IOException e) {

        System.out.println(e);}

    }

    }

}