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import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class Main {
public static void main(String[] args) throws Exception {
byte[] ary = new byte[128];
DatagramPacket pack = new DatagramPacket(ary, 128);
// read
DatagramSocket sock = new DatagramSocket(1111);
sock.receive(pack);
String word = new String(pack.getData());
System.out.println("From: " + pack.getAddress() + " Port: " + pack.getPort());
System.out.println(word);
sock.close();
// write
sock = new DatagramSocket();
pack.setAddress(InetAddress.getByName(args[1]));
pack.setData(args[2].getBytes());
pack.setPort(1111);
sock.send(pack);
sock.close();
}
}
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