//
//  UDPClient.java
//
//  Created by Ooi Wei Tsang on 26/01/06.
//
import java.util.*;
import java.net.*;
import java.io.*;

public class UDPClient {
	
	public static void main (String args[]) throws Exception {

		DatagramSocket s = new DatagramSocket();
		
		// convert string "hello" to array of bytes, suitable for
		// creation of DatagramPacket
		String str = "hello";
		byte outBuf[] = str.getBytes();

		// Now create a packet (with destination addr and port)
		InetAddress addr = InetAddress.getByName("www.nus.edu.sg");
		int port = 9876;
		DatagramPacket outPkt = new DatagramPacket(outBuf, outBuf.length,
			 addr, port);
		s.send(outPkt);
		
		// create a buffer to store data from packets received.
		byte inBuf[] = new byte[1000];
		DatagramPacket inPkt = new DatagramPacket(inBuf, inBuf.length);

		// receive the reply from server.
		s.receive(inPkt);

		// convert reply to string and print to System.out
		String reply = new String(inPkt.getData(), 0, inPkt.getLength());
		System.out.println(reply);
	}
}