//************ Datagram client for time ********
import java.net.DatagramSocket;
import java.net.DatagramPacket;
import java.util.Date;
import java.util.Random;
import java.io.IOException;

// test client for TimeServerDG
public class TimeReceiverDG {
    public static void main(String[ ] args) {
        Random r = new Random();  // used to vary the pause
        try {
            DatagramSocket sock = new DatagramSocket(port);
            // Create a receiving packet of the right size
            byte[ ] cargo = new Date().toString().getBytes();
            DatagramPacket time_packet = 
               new DatagramPacket(cargo, cargo.length);
            while (true) {
               sock.receive(time_packet); //*** blocks
               System.out.println("Server time: " + 
                         new String(time_packet.getData()));
               Thread.sleep(Math.abs(r.nextInt()) % 12 * 1000);
            }
        }
        catch(IOException e) { System.err.println(e); }
        catch(InterruptedException e) { System.err.println(e); }
    }
    private static final int port = 10001;
}