package test;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class UDPServer {
	public static void main (String args[])throws Exception {
		DatagramSocket serverSocket = new DatagramSocket(9876);
		while (true){
			byte [] receiveData = new byte[1024];
			byte [] sendData = new byte [1024];
			DatagramPacket receivePacket = new DatagramPacket (receiveData, receiveData.length);
			serverSocket.receive(receivePacket);
			String sentence = new String(receivePacket.getData());
			System.out.println("Receive: " + sentence.trim());
			InetAddress IPAddress = receivePacket.getAddress();
			int port = receivePacket.getPort();
			String capitalizedSentence = sentence.toUpperCase();
			sendData = capitalizedSentence.getBytes();
			DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
			serverSocket.send(sendPacket);
		}
	}
}
