import java.net.*;

public class DatagramExample {

  public static void main(String[] args) {
  
    String s = "This is a test.";
  
    byte[] data = s.getBytes();
    try {
      InetAddress ia = InetAddress.getByName("metalab.unc.edu");
      int port = 7;
      DatagramPacket dp 
       = new DatagramPacket(data, data.length, ia, port);
      System.out.println("This packet is addressed to " 
       + dp.getAddress() + " on port " + dp.getPort());
      System.out.println("There are " + dp.getLength() 
       + " bytes of data in the packet");
      System.out.println(
       new String(dp.getData(), dp.getOffset(), dp.getLength()));
    }
    catch (UnknownHostException e) {
      System.err.println(e);
    }
    
  }

}