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


public class UDPClient
{
    public static void main(String args[])
    {
        // goal: send "42" via UDP to myself, i.e. "localhost", on port 1027
        
        int port = 1027;
        
        // create data array of size 1 (for demonstration)
        int size = 1;
        byte[] data = new byte[size];
        data[0] = 42;
        
        try
        {
            // receiver address
            InetAddress receiver = InetAddress.getByName("localhost");
            
            DatagramPacket packet = new DatagramPacket(data, size, receiver, port);
            
            DatagramSocket udp_service = new DatagramSocket();
            
            udp_service.send(packet);
            
        }
        catch (Exception e)
        {
            System.err.println("Error: " + e.getMessage());
        }   
    }
}