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.] * * ------------------------- * XYItemLabelGenerator.java * ------------------------- * (C) Copyright 2001-2008, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 13-Dec-2001 : Version 1 (DG); * 16-Jan-2002 : Completed Javadocs (DG); * 13-Jun-2002 : Correction to Javadoc comments (DG); * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG); * 25-Feb-2004 : Renamed XYToolTipGenerator --> XYItemLabelGenerator (DG); * 15-Apr-2004 : Moved the generateToolTip() method to a separate * interface (DG); * 11-May-2004 : Renamed XYItemLabelGenerator --> XYLabelGenerator (DG); * 20-Apr-2005 : Reverted name change of 11-May-2004 (DG); * */ package org.jfree.chart.labels; import org.jfree.data.xy.XYDataset; /** * Interface for a label generator for plots that use data from an * {@link XYDataset}. */ public interface XYItemLabelGenerator { /** * Generates a label for the specified item. The label is typically a * formatted version of the data value, but any text can be used. * * @param dataset the dataset (<code>null</code> not permitted). * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The label (possibly <code>null</code>). */ public String generateLabel(XYDataset dataset, int series, int item); }