Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2013, 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. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * --------------- * PieDataset.java * --------------- * (C) Copyright 2001-2008, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Sam (oldman); * * 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. }