Java DatagramPacket .setAddress (InetAddress iaddr)

public void setAddress(InetAddress iaddr)

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.InetSocketAddress;
/*from w  w  w.jav a 2  s  . c  o m*/
public class Main {
  private final static int BUFSIZE = 20;

  public static void main(String args[]) {
    try {

      int port = 80;

      DatagramSocket ds = new DatagramSocket(port);

      byte buffer[] = new byte[BUFSIZE];

      while (true) {

        DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
        // Receive data
        ds.receive(dp);
        // Display address from the datagram packet
        InetAddress ia = dp.getAddress();
        System.out.println(ia);
        
        dp.setSocketAddress(InetSocketAddress.createUnresolved("google.com", 8080));
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}