www.pudn.com > jnp-src.rar > DaytimeServer.java

/*
 * Java Network Programming, Second Edition
 * Merlin Hughes, Michael Shoffner, Derek Hamner
 * Manning Publications Company; ISBN 188477749X
 *
 * http://nitric.com/jnp/
 *
 * Copyright (c) 1997-1999 Merlin Hughes, Michael Shoffner, Derek Hamner;
 * all rights reserved; see license.txt for details.
 */

import java.io.*; 
import java.net.*; 
 
public class DaytimeServer { 
  public static final int DEFAULT_PORT = 13; 
  public static void main (String[] args) throws IOException { 
    if (args.length > 1) 
      throw new IllegalArgumentException ("Syntax: DaytimeServer []"); 
    DatagramSocket socket = new DatagramSocket 
      (args.length == 0 ? DEFAULT_PORT : Integer.parseInt (args[0])); 
    DatagramPacket packet = new DatagramPacket (new byte[1], 1); 
    while (true) { 
      socket.receive (packet); 
      System.out.println 
        ("Received from: " + packet.getAddress () + ":" + packet.getPort ()); 
      byte[] outBuffer = new java.util.Date ().toString () 
        .getBytes ("latin1"); 
      packet.setData (outBuffer); 
      packet.setLength (outBuffer.length); 
      socket.send (packet); 
    } 
  } 
}