I need the steps involved in DEVELOPING and application that will allow client connect to a server and then the client will be able to communicate with each other

• Socket
• RMI
• Web Services

package client_server;


import java.net.*;
import java.io.*;
public class Client
{
	static void show(String s)
	{
	   System.out.println(s);
	}
        
   
	public static void main(String a[])
	{
	   int port=1500;
	   String server = "localhost";
            Socket s1=null;
	   BufferedReader input;
           PrintWriter p1;
	   String msg = null;
		try
		{
			s1=new Socket(server,port);
			show("connected with server");
                        p1= new PrintWriter(s1.getOutputStream(),true);
                        p1.println(5);
                        p1.println(10);
			input= new BufferedReader(new InputStreamReader(s1.getInputStream()));
			msg=input.readLine();
			show("from server");
			show(msg);
			s1.close();  
		}
		catch(Exception e)
		{
			 System.out.println("Exception :"+e);
		}
           
         
	}
}

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


public class Server
{
	static void show(String s)
	{
	   System.out.println(s);
	}
	public static void main(String a[])
	{
	   int port=1500;
	  ServerSocket s2;
       	  Socket s=null;
	   PrintWriter p1;
	   String msg = null;
           int b,c,d;
           BufferedReader input;
		try
		{
			s2=new ServerSocket(port);
			show("server is waiting");
			s=s2.accept();
			p1= new PrintWriter(s.getOutputStream(),true);
			show("new connection accepted");
			
			input= new BufferedReader(new InputStreamReader(s.getInputStream()));
			c=Integer.parseInt(input.readLine());
                        		d=Integer.parseInt(input.readLine());
                       		 b=c+d;
                      		  p1.println(b + " ");
        		s.close();   
			}
		catch(Exception e)
		{
			 System.out.println("Exception :"+e);
		}
           
	}
}