commons-net-1.4.1.jar - Apache Commons Net

commons-net-1.4.1.jar is the JAR file for Apache Commons Net 1.4.1, which implements the client side of many basic Internet protocols.

commons-net-1.4.1.jar is distributed as part of the download file.

JAR File Size and Download Location:

JAR name: commons-net.jar, commons-net-1.4.1.jar
Target JDK version: 1.4
Dependency: None
File name: commons-net-1.4.1.jar
File size: 180792 bytes
Date modified: 03-Dec-2005
Download: Apache Commons Net



 * Copyright 2001-2005 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 DaytimeUDPClient class is a UDP implementation of a client for the
 * Daytime protocol described in RFC 867.  To use the class, merely
 * open a local datagram socket with
 * {@link  open }
 * and call {@link #getTime  getTime } to retrieve the daytime
 * string, then
 * call {@link  close }
 * to close the connection properly.  Unlike
 * {@link},
 * successive calls to {@link #getTime  getTime } are permitted
 * without re-establishing a connection.  That is because UDP is a
 * connectionless protocol and the Daytime protocol is stateless.
 * <p>
 * <p>
 * @author Daniel F. Savarese
 * @see DaytimeTCPClient

public final class DaytimeUDPClient extends DatagramSocketClient
    /*** The default daytime port.  It is set to 13 according to RFC 867. ***/
    public static final int DEFAULT_PORT = 13;

    private byte[] __dummyData = new byte[1];
    // Received dates should be less than 256 bytes
    private byte[] __timeData = new byte[256];

     * Retrieves the time string from the specified server and port and
     * returns it.
     * <p>
     * @param host The address of the server.
     * @param port The port of the service.
     * @return The time string.
     * @exception IOException If an error occurs while retrieving the time.
    public String getTime(InetAddress host, int port) throws IOException
        DatagramPacket sendPacket, receivePacket;

        sendPacket =
            new DatagramPacket(__dummyData, __dummyData.length, host, port);
        receivePacket = new DatagramPacket(__timeData, __timeData.length);


        return new String(receivePacket.getData(), 0, receivePacket.getLength());

    /*** Same as <code>getTime(host, DaytimeUDPClient.DEFAULT_PORT);</code> ***/
    public String getTime(InetAddress host) throws IOException
        return getTime(host, DEFAULT_PORT);




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File size: 324370 bytes
Release date: 2013-03-03


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