import java.net.*;
import java.io.IOException;

public class DatagramSend {
  static final int PORT = 7890;

  public static void main( String args[] ) throws Exception {
    String theStringToSend = "I'm a datagram and I'm O.K.";
    byte[] theByteArray = new byte[ theStringToSend.length() ];
    theByteArray = theStringToSend.getBytes();
// Get the IP address of our destination...
    InetAddress theIPAddress = null;
    try {
      System.out.println("Get the IP address of our destination...");
      theIPAddress = InetAddress.getByName( "localhost" );
    } catch (UnknownHostException e) {
      System.out.println("Host not found: " + e);
      System.exit(1);
    }
// Build the packet...
    System.out.println("Build the packet...");
//    System.out.println("IP address:" + getAddress() + " Port:" /*+ getPort()*/ );
    DatagramPacket thePacket = new DatagramPacket( theByteArray,
      theStringToSend.length(), theIPAddress, PORT );
    System.out.println("Build the packet...");
    System.out.println("IP address:" + thePacket.getAddress() + " Port:" + thePacket.getPort() );
// Now send the packet
    DatagramSocket theSocket = null;
    try {
      theSocket = new DatagramSocket();
    } catch (SocketException e) {
      System.out.println("Underlying network software has failed: " + e);
      System.exit(1);
    }
    try {
      System.out.println("Now send the packet...");
      theSocket.send( thePacket );
    } catch (IOException e) {
      System.out.println("IO Exception: " + e);
    }
    theSocket.close();
  }
}