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.] * * -------------------------- * TimePeriodValuesDemo3.java * -------------------------- * (C) Copyright 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: TimePeriodValuesDemo3.java,v 1.4 2004/04/26 19:12:03 taqua Exp $ * * Changes * ------- * 30-Jan-2004 : Version 1 (DG); * */ package org.jfree.chart.demo; import java.text.DateFormat; import java.util.Date; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYBarRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.time.SimpleTimePeriod; import org.jfree.data.time.TimePeriodValues; import org.jfree.data.time.TimePeriodValuesCollection; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * This demo shows a bar chart with time based data where the time periods are slightly * irregular. * */ public class TimePeriodValuesDemo3 extends ApplicationFrame { /** * Creates a new demo instance. * * @param title the frame title. */ public TimePeriodValuesDemo3(final String title) { super(title); final XYDataset data1 = createDataset(); final XYItemRenderer renderer1 = new XYBarRenderer(); final DateAxis domainAxis = new DateAxis("Date"); final ValueAxis rangeAxis = new NumberAxis("Value"); final XYPlot plot = new XYPlot(data1, domainAxis, rangeAxis, renderer1); final JFreeChart chart = new JFreeChart("Time Period Values Demo 3", plot); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); chartPanel.setMouseZoomable(true, false); 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. * // **************************************************************************** /** * Creates a dataset, consisting of two series of monthly data. * * @return the dataset. */ public XYDataset createDataset() { final TimePeriodValues s1 = new TimePeriodValues("Series 1"); final DateFormat df = DateFormat.getInstance(); try { final Date d0 = df.parse("11/5/2003 0:00:00.000"); final Date d1 = df.parse("11/5/2003 0:15:00.000"); final Date d2 = df.parse("11/5/2003 0:30:00.000"); final Date d3 = df.parse("11/5/2003 0:45:00.000"); final Date d4 = df.parse("11/5/2003 1:00:00.001"); final Date d5 = df.parse("11/5/2003 1:14:59.999"); final Date d6 = df.parse("11/5/2003 1:30:00.000"); final Date d7 = df.parse("11/5/2003 1:45:00.000"); final Date d8 = df.parse("11/5/2003 2:00:00.000"); final Date d9 = df.parse("11/5/2003 2:15:00.000"); s1.add(new SimpleTimePeriod(d0, d1), 0.39); //s1.add(new SimpleTimePeriod(d1, d2), 0.338); s1.add(new SimpleTimePeriod(d2, d3), 0.225); s1.add(new SimpleTimePeriod(d3, d4), 0.235); s1.add(new SimpleTimePeriod(d4, d5), 0.238); s1.add(new SimpleTimePeriod(d5, d6), 0.236); s1.add(new SimpleTimePeriod(d6, d7), 0.25); s1.add(new SimpleTimePeriod(d7, d8), 0.238); s1.add(new SimpleTimePeriod(d8, d9), 0.215); } catch (Exception e) { System.out.println(e.toString()); } final TimePeriodValuesCollection dataset = new TimePeriodValuesCollection(); dataset.addSeries(s1); dataset.setDomainIsPointsInTime(false); return dataset; } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final TimePeriodValuesDemo3 demo = new TimePeriodValuesDemo3("Time Period Values Demo 3"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }