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jfreechart example source code file (

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

Java - jfreechart tags/keywords

dataset, dataset, datasetchangeevent, datasetchangeevent

The jfreechart source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 * Project Info:
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 * -----------------------
 * -----------------------
 * (C) Copyright 2000-2008, by Object Refinery Limited.
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 * Changes (from 24-Aug-2001)
 * --------------------------
 * 24-Aug-2001 : Added standard source header. Fixed DOS encoding problem (DG);
 * 15-Oct-2001 : Move to new package (*) (DG);
 * 22-Oct-2001 : Renamed --> etc. (DG);
 * 11-Jun-2002 : Separated the event source from the dataset to cover the case
 *               where the dataset is changed to null in the Plot class.
 *               Updated Javadocs (DG);
 * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 05-Oct-2004 : Minor Javadoc updates (DG);


 * A change event that encapsulates information about a change to a dataset.
public class DatasetChangeEvent extends java.util.EventObject {

     * The dataset that generated the change event.
    private Dataset dataset;

     * Constructs a new event.  The source is either the dataset or the
     * {@link org.jfree.chart.plot.Plot} class.  The dataset can be
     * <code>null (in this case the source will be the
     * {@link org.jfree.chart.plot.Plot} class).
     * @param source  the source of the event.
     * @param dataset  the dataset that generated the event (<code>null
     *                 permitted).
    public DatasetChangeEvent(Object source, Dataset dataset) {
        this.dataset = dataset;

     * Returns the dataset that generated the event.  Note that the dataset
     * may be <code>null since adding a null dataset to a
     * plot will generated a change event.
     * @return The dataset (possibly <code>null).
    public Dataset getDataset() {
        return this.dataset;


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