JAVA CODE FOR TCP MESSAGE TRANSFER

PROGRAM: (SERVER)

import java.net.*;

import java.io.*;

public class TcpServer

{

public static void main(String args[]) throws IOException

{

ServerSocket serverSocket=null;

try

{

serverSocket=new ServerSocket(1234);

}

catch(IOException e)

{

System.err.println("Could not Listen on Port:1234.");

System.exit(1);

}

Socket clientSocket=null;

try

{

clientSocket=serverSocket.accept();

}

catch(IOException e)

{

System.err.println("Accept Failed.");

System.exit(1);

}

PrintWriter out=new PrintWriter(clientSocket.getOutputStream(),

true);

BufferedReader in=new  BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

String int1,int2;

int num1=0,num2=0;

int1=in.readLine();

System.out.println("Received Number1:: "+int1);

int2=in.readLine();

System.out.println("Received Number2::  "+int2);

System.out.println(int1+"*"+int2);

try

{

 num1=Integer.parseInt(int1);

 num2=Integer.parseInt(int2);

}

catch(NumberFormatException nfe)

{

System.out.println("Numbers not Intergers");

out.println("Numbers not intergers");

}

System.out.print("="+num1*num2);

out.println(String.valueOf(num1*num2));

out.close();

in.close();

clientSocket.close();

serverSocket.close();

}

}

PROGRAM: (CLIENT)

import java.io.*;

import java.net.*;

public class TcpClient

{

public static void main(String[] args) throws IOException

{

Socket socket=null;

PrintWriter out=null;

BufferedReader in=null;

try

{

socket=new Socket("127.0.0.1",1234);

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

in=new BufferedReader(new InputStreamReader(socket.getInputStream()));

}

catch(UnknownHostException e)

{

System.err.println("Don't know about Host!!");

System.exit(1);

}

catch(IOException e)

{

System.err.println("Couldn't get I/o for the connection!!");

System.exit(1);           

}

BufferedReader read=new BufferedReader(new InputStreamReader(System.in));

String num1,num2;

System.out.println("Enter Number1:: ");

num1=read.readLine();

out.println(num1);

System.out.println("Enter Number2:: ");

num2=read.readLine();

out.println(num2);

System.out.println("Product of two given Numbers are:: ");

System.out.println(in.readLine());

out.close();

in.close();

read.close();

socket.close();

}

}

OUTPUT:(SERVER)

Received Number1::5

Received Number2::5

5*5

=25

OUTPUT:(CLIENT)

Enter Number1::

5

Enter Number2::

5

Product of two given Numbers are::

25