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.] * * ---------------------- * IntervalXYDataset.java * ---------------------- * (C) Copyright 2001-2009, by Object Refinery Limited and Contributors. * * Original Author: Mark Watson (www.markwatson.com); * Contributor(s): David Gilbert (for Object Refinery Limited); * * Changes * ------- * 18-Oct-2001 : Version 1, thanks to Mark Watson (DG); * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc (DG); * 06-May-2004 : Added methods that return double primitives (DG); * 15-Sep-2009 : Added clarifications to API docs (DG); * */ package org.jfree.data.xy; /** * An extension of the {@link XYDataset} interface that allows an x-interval * and a y-interval to be defined. Note that the x and y values defined * by the parent interface are NOT required to fall within these intervals. * This interface is used to support (among other things) bar plots against * numerical axes. */ public interface IntervalXYDataset extends XYDataset { /** * Returns the lower bound of the x-interval for the specified series and * item. If this lower bound is specified, it should be less than or * equal to the upper bound of the interval (if one is specified). * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The lower bound of the x-interval (<code>null</code> permitted). */ public Number getStartX(int series, int item); /** * Returns the lower bound of the x-interval (as a double primitive) for * the specified series and item. * * @param series the series (zero-based index). * @param item the item (zero-based index). * * @return The lower bound of the x-interval. * * @see #getStartX(int, int) */ public double getStartXValue(int series, int item); /** * Returns the upper bound of the x-interval for the specified series and * item. If this upper bound is specified, it should be greater than or * equal to the lower bound of the interval (if one is specified). * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The upper bound of the x-interval (<code>null</code> permitted). */ public Number getEndX(int series, int item); /** * Returns the upper bound of the x-interval (as a double primitive) for * the specified series and item. * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The upper bound of the x-interval. * * @see #getEndX(int, int) */ public double getEndXValue(int series, int item); /** * Returns the lower bound of the y-interval for the specified series and * item. If this lower bound is specified, it should be less than or * equal to the upper bound of the interval (if one is specified). * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The lower bound of the y-interval (<code>null</code> permitted). */ public Number getStartY(int series, int item); /** * Returns the lower bound of the y-interval (as a double primitive) for * the specified series and item. * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The lower bound of the y-interval. * * @see #getStartY(int, int) */ public double getStartYValue(int series, int item); /** * Returns the upper bound of the y-interval for the specified series and * item. If this upper bound is specified, it should be greater than or * equal to the lower bound of the interval (if one is specified). * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The upper bound of the y-interval (<code>null</code> permitted). */ public Number getEndY(int series, int item); /** * Returns the upper bound of the y-interval (as a double primitive) for * the specified series and item. * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The upper bound of the y-interval. * * @see #getEndY(int, int) */ public double getEndYValue(int series, int item); }