ChatServer.java

import java.io.*;       // Buffered Reader
import java.net.*;      // Server, Socket, SocketServer

class ChatServer
{
    public static void main(String A[]) throws Exception
    {
        System.out.println("Server Application Is Running...");

        ServerSocket ssobj = new ServerSocket(2100);          

        System.out.println("Server Is Waiting At Port 2100");

        Socket sobj = ssobj.accept();       // Accept Client Request

        System.out.println("Client Request Gets Accepted Successfully");

        PrintStream pobj = new PrintStream(sobj.getOutputStream());     // Bolnara

        BufferedReader bobj1 = new BufferedReader(new InputStreamReader(sobj.getInputStream()));        // Ayaknara

        BufferedReader bobj2 = new BufferedReader(new InputStreamReader(System.in));        // Keyboard Input

        System.out.println("-----------------------------------------------");
        System.out.println("------------- Ketanbaba Chat Server -----------");
        System.out.println("-----------------------------------------------");

        String str1 = null, str2 = null;

        while((str1 = bobj1.readLine()) != null)
        {
            System.out.println("Client Says : "+str1);
            System.out.println("Enter Message For CLient : ");
            str2 = bobj2.readLine();
            pobj.println(str2);
            
        }

        sobj.close();
        ssobj.close();
    }
}