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.] * * -------------------- * 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</code> instance, with the * category label being provided by the <code>toString</code> method. */ public interface CategoryDataset extends KeyedValues2D, Dataset { // no additional methods required }