piedataset.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 62 行

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * PieDataset.java
 * ---------------
 * (C) Copyright 2001-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Sam (oldman);
 *
 * $Id: PieDataset.java,v 1.2 2005/03/04 11:49:56 mungady Exp $
 *
 * Changes
 * -------
 * 17-Nov-2001 : Version 1 (DG);
 * 22-Jan-2002 : Removed the getCategoryCount() method, updated Javadoc 
 *               comments (DG);
 * 18-Apr-2002 : getCategories() now returns List instead of Set (oldman);
 * 23-Oct-2002 : Reorganised the code: PieDataset now extends KeyedValues 
 *               interface (DG);
 * 04-Mar-2003 : Now just replicates the KeyedValuesDataset interface (DG);
 *
 */

package org.jfree.data.general;

import org.jfree.data.KeyedValues;

/**
 * A general purpose dataset where values are associated with keys.  As the 
 * name suggests, you can use this dataset to supply data for pie charts (refer
 * to the {@link org.jfree.chart.plot.PiePlot} class).
 */
public interface PieDataset extends KeyedValues, Dataset {

    // no new methods added.

}