client.java

自己写的一个聊天的小程序 请多多指教

/*
 * Copyright (c) 2003 - 2007, Silvio Meier and Tobias Reinhard
 *
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 *
 *   o Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer.
 *   o Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution.
 *   o The names of its contributors may not be used to endorse 
 *     or promote products derived from this software without 
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.sf.cscc.examples.simplesystem;

// awt packages

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import net.sf.cscc.ClientConnectionManager;
import net.sf.cscc.CommunicationEvent;
import net.sf.cscc.CommunicationEventObserver;
import net.sf.cscc.DataEvent;
import net.sf.cscc.DataEventBaseObserver;
import net.sf.cscc.DataEventReceivingObserver;



/**
 *      This class provides a client application, which demonstrates the usage
 *      of this client/server component. The client application allows to connect
 *      to a specific server with a specific port and sends then some 
 *      information about the user over the net. The data is sent by calling 
 *      the method 
 *      {@link net.sf.cscc.ClientConnectionManager#sendDataEvent(DataEvent de)}. <br>
 *      Important for using the client/server component is the implementation of the
 *      methods {@link #receiveEvent(CommunicationEvent ce)} and {@link #receiveEvent(DataEvent de)}
 *      which allow to receive data and communication events from the client/server
 *      component.
 *
 *		@author			Silvio Meier
 *		@copyright      Silvio Meier, Tobias Reinhard, 2003
 *		@history		2003-05-15 SM First Version.
 *                      2003-05-16 SM Comments and full implemented functionality.
 *                      2003-05-17 SM Comments corrected
 *                      2003-05-18 SM Unecessary close call removed when getting
 *                                    a closed connection communication event.
 *                      2003-05-28 SM Make up in gui resized some labels and buttons
 *                                    to fit on screen with different sized fonts.
 *                      2003-06-12 SM Now it is checked if the connection was
 *                                    established or not. The client does not
 *                                    change into connected status anymore, if the
 *                                    connection was not established successfully.
 *    					2004-12-13 SM Some cleaning of unused things.
 *    					2006-11-28 SM Comments revised.
 *	@version			$Date: 2007/07/01 17:04:07 $, $Author: reode_orm $, $Revision: 1.1 $
 */
public class Client extends javax.swing.JFrame implements ActionListener, DataEventReceivingObserver, CommunicationEventObserver {

    /**
	 * Serial Id.
	 */
	private static final long serialVersionUID = -1197331091403391467L;

	/**
     *  Client connection manager, handles the connection to the server.
     */
    private ClientConnectionManager clientConnectionManager = null;

    /**
     *  Status label
     */
    private javax.swing.JLabel status;

    /**
     *  Textfield for entering the last name
     */
    private javax.swing.JTextField lastName;

    /**
     *  Button for start the sending of data.
     */
    private javax.swing.JButton send;

    /**
     *  Left panel to structure the output screen.
     */
    private javax.swing.JPanel leftPanel;

    /**
     *  Textarea which shows messages about all the events that occur.
     */
    private javax.swing.JTextArea serverMessages;

    /**
     *  Button for connecting to server.
     */
    private javax.swing.JButton connect;

    /**
     *  Label describing the status label
     *  @see #status
     */
    private javax.swing.JLabel statusLabel;

    /**
     *  Textfield for entering the last name
     */
    private javax.swing.JTextField firstName;

    /**
     *  Right panel to structure the output screen.
     */
    private javax.swing.JPanel rightPanel;

    /**
     *  Bottom panel to structure the output screen.
     */
    private javax.swing.JPanel bottomPanel;

    /**
     *  Label describing the age field.
     */
    private javax.swing.JLabel ageLabel;

    /**
     *  Label describing the message text area field.
     */
    private javax.swing.JLabel serverMessagesLabel;

    /**
     *  Scroll panel for scrolling within the text area.
     */
    private javax.swing.JScrollPane messageScroller;

    /**
     *  Label indicating the textfield for entering the
     *  the server name.
     */
    private javax.swing.JLabel serverLabel;

    /**
     *  Textfield for entering the TCP/IP port number.
     */
    private javax.swing.JTextField port;

    /**
     *  Textfield for entering the age of the person.
     */
    private javax.swing.JTextField age;

    /**
     *  Label indicating the textfield for entering the
     *  last name.
     */
    private javax.swing.JLabel lastNameLabel;

    /**
     *  Label indicating the textfield for entering the
     *  first name.
     */
    private javax.swing.JLabel firstNameLabel;

    /**
     *  Label indicating the textfield for entering the port
     *  number.
     */
    private javax.swing.JLabel portLabel;

    /**
     *  Textfield for entering the destination server.
     */
    private javax.swing.JTextField server;

    /**
     *  Bottom panel to structure the output screen.
     */
    private boolean connected = false;


    /**
     *   Constructor initializes the gui and prepares for creating a
     *   connection to a server
     *   @pre true
     *   @post true
     */
    public Client() {
        super("Example Client");
        // new client connection manager which handles the connection to the server
        clientConnectionManager = new ClientConnectionManager(Server.PORT_NUMBER);
        // register this class as observer for communication events
        clientConnectionManager.addObserver((CommunicationEventObserver)this);
        // register this class as observer for data events
        clientConnectionManager.addObserver((DataEventReceivingObserver)this);
        // init the gui elements
        initComponents();
    }

    /**
     *   This method initializes the gui.
     *   @pre true
     *   @post true
     */
    private void initComponents() {
        leftPanel = new javax.swing.JPanel();
        firstNameLabel = new javax.swing.JLabel();
        lastNameLabel = new javax.swing.JLabel();
        firstName = new javax.swing.JTextField();
        lastName = new javax.swing.JTextField();
        ageLabel = new javax.swing.JLabel();
        age = new javax.swing.JTextField();
        send = new javax.swing.JButton();
        rightPanel = new javax.swing.JPanel();
        statusLabel = new javax.swing.JLabel();
        status = new javax.swing.JLabel();
        serverLabel = new javax.swing.JLabel();
        server = new javax.swing.JTextField();
        portLabel = new javax.swing.JLabel();
        port = new javax.swing.JTextField();
        connect = new javax.swing.JButton();
        bottomPanel = new javax.swing.JPanel();
        messageScroller = new javax.swing.JScrollPane();
        serverMessages = new javax.swing.JTextArea();
        serverMessagesLabel = new javax.swing.JLabel();

        send.addActionListener(this);
        connect.addActionListener(this);

        getContentPane().setLayout(null);