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.] * * ------------------------- * TimePeriodValuesDemo.java * ------------------------- * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: TimePeriodValuesDemo.java,v 1.18 2004/04/27 14:53:10 mungady Exp $ * * Changes * ------- * 08-Apr-2002 : Version 1 (DG); * 25-Jun-2002 : Removed unnecessary import (DG); * */ package org.jfree.chart.demo; import java.text.SimpleDateFormat; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.axis.DateTickUnit; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.chart.renderer.xy.XYBarRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.time.Day; import org.jfree.data.time.Hour; import org.jfree.data.time.Minute; 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; /** * An example of.... * */ public class TimePeriodValuesDemo extends ApplicationFrame { /** * A demonstration application showing how to.... * * @param title the frame title. */ public TimePeriodValuesDemo(final String title) { super(title); final XYDataset data1 = createDataset1(); final XYItemRenderer renderer1 = new XYBarRenderer(); final DateAxis domainAxis = new DateAxis("Date"); domainAxis.setVerticalTickLabels(true); domainAxis.setTickUnit(new DateTickUnit(DateTickUnit.HOUR, 1)); domainAxis.setDateFormatOverride(new SimpleDateFormat("hh:mm")); domainAxis.setLowerMargin(0.01); domainAxis.setUpperMargin(0.01); final ValueAxis rangeAxis = new NumberAxis("Value"); final XYPlot plot = new XYPlot(data1, domainAxis, rangeAxis, renderer1); final XYDataset data2 = createDataset2(); final StandardXYItemRenderer renderer2 = new StandardXYItemRenderer( StandardXYItemRenderer.SHAPES_AND_LINES); renderer2.setShapesFilled(true); plot.setDataset(1, data2); plot.setRenderer(1, renderer2); final JFreeChart chart = new JFreeChart("Supply and Demand", 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 createDataset1() { final TimePeriodValues s1 = new TimePeriodValues("Supply"); final TimePeriodValues s2 = new TimePeriodValues("Demand"); final Day today = new Day(); for (int i = 0; i < 24; i++) { final Minute m0 = new Minute(0, new Hour(i, today)); final Minute m1 = new Minute(15, new Hour(i, today)); final Minute m2 = new Minute(30, new Hour(i, today)); final Minute m3 = new Minute(45, new Hour(i, today)); final Minute m4 = new Minute(0, new Hour(i + 1, today)); s1.add(new SimpleTimePeriod(m0.getStart(), m1.getStart()), Math.random()); s2.add(new SimpleTimePeriod(m1.getStart(), m2.getStart()), Math.random()); s1.add(new SimpleTimePeriod(m2.getStart(), m3.getStart()), Math.random()); s2.add(new SimpleTimePeriod(m3.getStart(), m4.getStart()), Math.random()); } final TimePeriodValuesCollection dataset = new TimePeriodValuesCollection(); dataset.addSeries(s1); dataset.addSeries(s2); return dataset; } /** * Creates a dataset, consisting of two series of monthly data. * * @return the dataset. */ public XYDataset createDataset2() { final TimePeriodValues s1 = new TimePeriodValues("WebCOINS"); final Day today = new Day(); for (int i = 0; i < 24; i++) { final Minute m0 = new Minute(0, new Hour(i, today)); final Minute m1 = new Minute(30, new Hour(i, today)); final Minute m2 = new Minute(0, new Hour(i + 1, today)); s1.add(new SimpleTimePeriod(m0.getStart(), m1.getStart()), Math.random() * 2.0); s1.add(new SimpleTimePeriod(m1.getStart(), m2.getStart()), Math.random() * 2.0); } final TimePeriodValuesCollection dataset = new TimePeriodValuesCollection(); dataset.addSeries(s1); return dataset; } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final TimePeriodValuesDemo demo = new TimePeriodValuesDemo("Time Period Values Demo 1"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }