import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class Main {
public static void main(String[] args) throws Exception {
DatagramSocket ds = new DatagramSocket();
String str = "hello world";
InetAddress ia = InetAddress.getByName("127.0.0.1");
DatagramPacket dp = new DatagramPacket(str.getBytes(), str.length(), ia, 3000);
ds.send(dp);
ds.close();
}
}