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

public class randoms
{

static final int rport = 1909;

public static void main(String[] args)
{
  try
{
   while (true)
   {
     Socket mysocket;
     ServerSocket listener;

     listener = new ServerSocket(rport);   
     mysocket = listener.accept();  // passive open;
     randomthread rt = new randomthread(mysocket);
     rt.start();   // starts thread
     listener.close();
   } // end infinite while
} catch (Exception E) { System.out.println(E); }
}  // end main


} // end randoms


class randomthread extends Thread
{  Socket mysocket;
   public randomthread(Socket s)
    { super();  mysocket = s; }
  
 public void run()
  {
  try {
   // serve a random number
   String instring = "dd";
   OutputStreamWriter osw = 
   new OutputStreamWriter(mysocket.getOutputStream());
   PrintWriter sender = new PrintWriter(osw,true);
   BufferedReader receiver = new BufferedReader(
    new InputStreamReader(mysocket.getInputStream()));

   sender.println("ready to transmit");

   while (!(instring.equals("ready to receive")))
     instring = receiver.readLine();
   String outstring;
   outstring = "" + ( (int) (Math.random() * 100));
   sender.println(outstring);  // send to client

   mysocket.close();
  } catch (Exception E) { System.out.println(E); }
  } // end run
}  // end randomthread