// dgtalker5 in Java

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

public class Dgtalker5 {

	public static void main(String[] args) throws IOException {

		if (args.length != 3) {
			System.err.println("usage: java Dgtalker5 hostname remoteport message");
			return;
		}

		DatagramSocket socket = new DatagramSocket();

		byte[] sbuf = args[2].getBytes();

		InetAddress rhost = InetAddress.getByName(args[0]);

		// construct and send spacket
		DatagramPacket spacket = new DatagramPacket(sbuf, sbuf.length, rhost,
													Integer.valueOf(args[1]));
		socket.send(spacket);

		// recieve reply
		byte[] rbuf = new byte[1000];

		DatagramPacket rpacket = new DatagramPacket(rbuf, rbuf.length);
		socket.receive(rpacket);

		String mess = new String(rpacket.getData());

		System.out.println("Got message of " + rpacket.getLength() +
						   "content: " + mess);

	} // main()


} // class Dgtalker5