Java tutorial
/* * =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * (C) Copyright 2000-2004, 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 1.1 2011-01-31 09:02:18 klukas 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; /** * A general purpose dataset where values are associated with keys. * <p> * As the name suggests, you can use this dataset to supply data for pie charts. */ public interface PieDataset extends KeyedValues, Dataset { // no new methods added. }