Java

import java.net.*;
import java.io.*;
public class EchoClient
{
	public static void main(String[] args) throws IOException
	{
		Socket echosocket = null;    		
                PrintWriter out =null;
		BufferedReader in=null;
		
		try
		{
		echosocket = new Socket("dkc678-01",7); 
                out=new PrintWriter(echosocket.getOutputStream(),true); 
     in=new BufferedReader(new InputStreamReader(echosocket.getInputStream())); 			
		}
		catch(UnknownHostException e) 
		{
			System.err.print("Unable to find the host dkc678-01");
			System.exit(1);
		}
		catch(IOException e)
		{
			System.err.print("No IO for host dkc678-01");
			System.exit(1);
		}
		
		//To send data through the socket to the server, 
		//EchoClient simply needs to write to the PrintWriter. 
		//To get the server's response, EchoClient reads from the BufferedReader.
		
		
		BufferedReader stdIn=new BufferedReader(new InputStreamReader(System.in));
		String userInput;
				
		while((userInput =stdIn.readLine())!= null )
		{
			out.println(userInput);   			               System.out.println("echo :" + in.readLine		       }
				
	   out.close();
	   in.close();
	   stdIn.close();
	   echosocket.close();
	}   
	     
}