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jfreechart example source code file (CategoryDataset.java)

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

Java - jfreechart tags/keywords

categorydataset, categorydataset, dataset, dataset, keyedvalues2d, keyedvalues2d

The jfreechart CategoryDataset.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * 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.]
 * --------------------
 * CategoryDataset.java
 * --------------------
 * (C) Copyright 2000-2008, by Object Refinery Limited.
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 * Changes (from 21-Aug-2001)
 * --------------------------
 * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
 * 18-Sep-2001 : Updated e-mail address in header (DG);
 * 15-Oct-2001 : Moved to new package (com.jrefinery.data.*) (DG);
 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
 * 17-Nov-2001 : Updated Javadoc comments (DG);
 * 04-Mar-2002 : Updated import statement (DG);
 * 23-Oct-2002 : Reorganised code (DG);
 * 10-Jan-2003 : Updated Javadocs (DG);
 * 21-Jan-2003 : Merged with TableDataset (which only existed in CVS) (DG);
 * 13-Mar-2003 : Added KeyedValues2DDataset interface (DG);
 * 23-Apr-2003 : Switched CategoryDataset and KeyedValues2DDataset so that
 *               CategoryDataset is the super interface (DG);
 * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.category (DG);

package org.jfree.data.category;

import org.jfree.data.KeyedValues2D;
import org.jfree.data.general.Dataset;

 * The interface for a dataset with one or more series, and values associated
 * with categories.
 * <P>
 * The categories are represented by <code>Comparable instance, with the
 * category label being provided by the <code>toString method.
public interface CategoryDataset extends KeyedValues2D, Dataset {

    // no additional methods required


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