Duplex (Double End ) Network Chat By Socket Class in Java by CMD

Program for Client And Server :

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


// This Class "NetTwo" is for Server

public class NetTwo{

public static void main(String arr[]){
try{

ServerSocket server=new ServerSocket(NetTwoConstants.PORT_NUMBER);

System.out.println(" Waiting for client to connect .... ");
Socket socket=server.accept();

System.out.println(" Client connected.... ");

new NetTwoSendThread(socket,"Server");
new NetTwoReceiveThread(socket,"Client");

}catch(Exception e){
System.out.println(e);
}
}
}


// This class for client.

class NetTwoClient{
public static void main(String arr[]){
try{

Socket socket=new Socket(NetTwoConstants.HOST_NAME,NetTwoConstants.PORT_NUMBER);

System.out.println(" Server Connected. \n");

new NetTwoSendThread(socket,"Client");
new NetTwoReceiveThread(socket,"Server");

}catch(Exception e){
System.out.println(e);
}
}
}


//****************


// This class NetTwoSendThread is thread class use for the Send Message from One End to other.


class NetTwoSendThread extends Thread{
private Socket socket;
private String name;

public NetTwoSendThread(Socket socket,String name){
this.socket=socket;
this.name=name;
start();
}

public void run(){
try{

Scanner in=new Scanner(System.in);

PrintWriter out=new PrintWriter(socket.getOutputStream(),true);

String sendMessage="";

do{

sendMessage=in.nextLine();

out.println(sendMessage);

}while(!sendMessage.equalsIgnoreCase("exit"));

socket.close();

System.out.println(" *************** Connection close by "+name+" **************** ");

System.exit(0);

}catch(Exception e){
System.out.println(e);
}
}
}


//************************************************

// This class is of Thread Manage receive message from other end.

class NetTwoReceiveThread extends Thread{
private Socket socket;
private String name;

public NetTwoReceiveThread(Socket socket,String name){
this.socket=socket;
this.name=name;
start();
}

public void run(){
try{

Scanner in=new Scanner(socket.getInputStream());

String receiveMessage="";

do{
receiveMessage=in.nextLine();

System.out.println(name+" : "+receiveMessage);

}while(!receiveMessage.equalsIgnoreCase("exit"));

socket.close();

System.out.println(" **************** connection close ******************** ");

System.exit(0);

}catch(Exception e){
System.out.println(e);
}
}


}


//***************


// This class hold static constants.

class NetTwoConstants{

public static int PORT_NUMBER=1412;

public static String HOST_NAME="localhost";

}



Server Compile by CMD : ----->>>>> 

Client Compile by CMD : ----- >>>>> 

Typing Hello From Server CMD for CLient and message Hello from server receive by client.

Client Server Communications : -->  

Message "Exit" Type by Server to end Communications :--> 

This is total overall :-  *****************************>>>>>>>>>>>>>>>>>>>