import java.util.Scanner;
import java.io.InputStreamReader;
import java.io.DataOutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.ServerSocket;

public class SocketServer
{
 public static void main(String[] args)
 {
  String s;
  Scanner inputStream = null;
  PrintWriter outputStream = null;
  ServerSocket serverSocket = null;
  try
  {
	 // Wait for connection on port 6789
	 System.out.println("Waiting for a connection.");
	 serverSocket = new ServerSocket(6789);
	 Socket socket = serverSocket.accept();
	 // Connection made, set up streams
	 inputStream = new Scanner(new InputStreamReader(socket.getInputStream()));
     outputStream = new PrintWriter(new DataOutputStream(socket.getOutputStream()));

     // Read a line from the client
	 s = inputStream.nextLine();

	 // Output text to the client
     outputStream.println("Well, ");
	 outputStream.println(s + " is a fine programming language!");
     outputStream.flush();
	 System.out.println("Closing connection from " + s);
	 inputStream.close();
	 outputStream.close();
  }
  catch (Exception e)
  {
     // If any exception occurs, display it
     System.out.println("Error " + e);
  }
 }
}