Java Socket send text to server

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class Main {
   public static void main(String argv[]) throws Exception {
      String fact;/*from  w  w w.j  av a 2s . c o  m*/
      // create a socket to the server
      Socket clientEnd = new Socket("localhost", 6789);
      System.out.println("Connected to localhost at port 6789");
      // get streams
      PrintWriter toServer = new PrintWriter(clientEnd.getOutputStream(), true);
      BufferedReader fromServer = new BufferedReader(new InputStreamReader(clientEnd.getInputStream()));
      BufferedReader fromUser = new BufferedReader(new InputStreamReader(System.in));
      // get an integer from user
      System.out.print("Enter an integer: ");
      String n = fromUser.readLine();
      // send it to server
      toServer.println(n);
      System.out.println("Sent to server: " + n);
      // retrieve result
      fact = fromServer.readLine();
      System.out.println("Received from server: " + fact);
      // close the socket
      clientEnd.close();
   }
}