import java.net.*;

public class send {
    public static void main(String[] argv)
        throws Exception {
            DatagramSocket socket = new DatagramSocket();
            byte[] req = "1234".getBytes();
            DatagramPacket packet = new DatagramPacket(
                req, req.length, InetAddress.getByName("192.168.0.20"), 10000);
        socket.send(packet);
    }
}