import java.net.*;
public class UdpWatch{
	private DatagramSocket ds;
	private DatagramPacket dp;
	
	public static void main(String[] args)throws Exception{
			UdpWatch d = new UdpWatch();
			d.go();
		}
	public void go()throws Exception{
			byte[] buff = new byte[64];
			String s;
			ds = new DatagramSocket(Udp.PORT);
			dp = new DatagramPacket(buff,buff.length);
			while(true){
					ds.receive(dp);//hui zu se, wait();
					s = new String(dp.getData());
					System.out.println("From"+dp.getAddress()+": "+s);
				}
		}
}