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.] * * -------------------- * TimeSeriesDemo2.java * -------------------- * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: TimeSeriesDemo2.java,v 1.12 2004/04/26 19:12:03 taqua Exp $ * * Changes * ------- * 08-Apr-2002 : Version 1 (DG); * */ package org.jfree.chart.demo; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.ValueMarker; import org.jfree.data.time.Quarter; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A demo showing a time series (quarterly data) with a <code>null</code> value. The * <code>null</code> value causes a gap in the line connecting the data points. * */ public class TimeSeriesDemo2 extends ApplicationFrame { /** * A demonstration application showing a quarterly time series containing a null value. * * @param title the frame title. */ public TimeSeriesDemo2(final String title) { super(title); final TimeSeries series = new TimeSeries("Quarterly Data", Quarter.class); series.add(new Quarter(1, 2001), 500.2); series.add(new Quarter(2, 2001), 694.1); series.add(new Quarter(3, 2001), 734.4); series.add(new Quarter(4, 2001), 453.2); series.add(new Quarter(1, 2002), 500.2); series.add(new Quarter(2, 2002), null); series.add(new Quarter(3, 2002), 734.4); series.add(new Quarter(4, 2002), 453.2); final TimeSeriesCollection dataset = new TimeSeriesCollection(series); final JFreeChart chart = ChartFactory.createTimeSeriesChart("Time Series Demo 2", "Time", "Value", dataset, true, true, false); chart.getXYPlot().addRangeMarker(new ValueMarker(550.0)); final Quarter q = new Quarter(2, 2002); chart.getXYPlot().addDomainMarker(new ValueMarker(q.getMiddleMillisecond())); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); setContentPane(chartPanel); } // **************************************************************************** // * JFREECHART DEVELOPER GUIDE * // * The JFreeChart Developer Guide, written by David Gilbert, is available * // * to purchase from Object Refinery Limited: * // * * // * http://www.object-refinery.com/jfreechart/guide.html * // * * // * Sales are used to provide funding for the JFreeChart project - please * // * support us so that we can continue developing free software. * // **************************************************************************** /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final TimeSeriesDemo2 demo = new TimeSeriesDemo2("Time Series Demo 2"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }