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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright 2001-2004 The Apache Software Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

 * The DaytimeTCPClient class is a TCP implementation of a client for the
 * Daytime protocol described in RFC 867.  To use the class, merely
 * establish a connection with
 *  connect 
 * and call  getTime()  to retrieve the daytime
 * string, then
 * call  disconnect 
 * to close the connection properly.


* @author Daniel F. Savarese * @see DaytimeUDPClient ***/ public final class DaytimeTCPClient extends SocketClient { /*** The default daytime port. It is set to 13 according to RFC 867. ***/ public static final int DEFAULT_PORT = 13; // Received dates will likely be less than 64 characters. // This is a temporary buffer used while receiving data. private char[] __buffer = new char[64]; /*** * The default DaytimeTCPClient constructor. It merely sets the default * port to DEFAULT_PORT . ***/ public DaytimeTCPClient () { setDefaultPort(DEFAULT_PORT); } /*** * Retrieves the time string from the server and returns it. The * server will have closed the connection at this point, so you should * call * disconnect * after calling this method. To retrieve another time, you must * initiate another connection with * connect * before calling getTime() again. *

* @return The time string retrieved from the server. * @exception IOException If an error occurs while fetching the time string. ***/ public String getTime() throws IOException { int read; StringBuffer result = new StringBuffer(__buffer.length); BufferedReader reader; reader = new BufferedReader(new InputStreamReader(_input_)); while (true) { read =, 0, __buffer.length); if (read <= 0) break; result.append(__buffer, 0, read); } return result.toString(); } }

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