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.] * * ----------------------- * EventFrequencyDemo.java * ----------------------- * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: EventFrequencyDemo.java,v 1.19 2004/05/10 16:45:23 mungady Exp $ * * Changes (from 10-Oct-2002) * -------------------------- * 10-Oct-2002 : Added standard header and Javadocs (DG); * 11-Feb-2003 : Fixed 0.9.5 bug (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import java.text.DateFormat; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.labels.CategoryToolTipGenerator; import org.jfree.chart.labels.StandardCategoryToolTipGenerator; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.CategoryItemRenderer; import org.jfree.chart.renderer.category.LineAndShapeRenderer; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.data.time.Day; import org.jfree.date.SerialDate; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A demo application showing how to display category data against a date axis. * */ public class EventFrequencyDemo extends ApplicationFrame { /** * Creates a new demo. * * @param title the frame title. */ public EventFrequencyDemo(final String title) { super(title); // create a dataset... final DefaultCategoryDataset dataset = new DefaultCategoryDataset(); // initialise the data... final Day d1 = new Day(12, SerialDate.JUNE, 2002); final Day d2 = new Day(14, SerialDate.JUNE, 2002); final Day d3 = new Day(15, SerialDate.JUNE, 2002); final Day d4 = new Day(10, SerialDate.JULY, 2002); final Day d5 = new Day(20, SerialDate.JULY, 2002); final Day d6 = new Day(22, SerialDate.AUGUST, 2002); dataset.setValue(new Long(d1.getMiddleMillisecond()), "Series 1", "Requirement 1"); dataset.setValue(new Long(d1.getMiddleMillisecond()), "Series 1", "Requirement 2"); dataset.setValue(new Long(d2.getMiddleMillisecond()), "Series 1", "Requirement 3"); dataset.setValue(new Long(d3.getMiddleMillisecond()), "Series 2", "Requirement 1"); dataset.setValue(new Long(d4.getMiddleMillisecond()), "Series 2", "Requirement 3"); dataset.setValue(new Long(d5.getMiddleMillisecond()), "Series 3", "Requirement 2"); dataset.setValue(new Long(d6.getMiddleMillisecond()), "Series 1", "Requirement 4"); // create the chart... final JFreeChart chart = ChartFactory.createBarChart("Event Frequency Demo", // title "Category", // domain axis label "Value", // range axis label dataset, // dataset PlotOrientation.HORIZONTAL, // orientation true, // include legend true, // tooltips false // URLs ); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... // set the background color for the chart... chart.setBackgroundPaint(new Color(0xFF, 0xFF, 0xCC)); // final StandardLegend legend = (StandardLegend) chart.getLegend(); // legend.setDisplaySeriesShapes(true); // get a reference to the plot for further customisation... final CategoryPlot plot = chart.getCategoryPlot(); // plot.getDomainAxis().setMaxCategoryLabelWidthRatio(10.0f); plot.setRangeAxis(new DateAxis("Date")); final CategoryToolTipGenerator toolTipGenerator = new StandardCategoryToolTipGenerator("", DateFormat.getDateInstance()); // final CategoryItemRenderer renderer = new LineAndShapeRenderer(LineAndShapeRenderer.SHAPES); // renderer.setToolTipGenerator(toolTipGenerator); // plot.setRenderer(renderer); // **************************************************************************** // * 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. * // **************************************************************************** // OPTIONAL CUSTOMISATION COMPLETED. // add the chart to a panel... final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); setContentPane(chartPanel); } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final EventFrequencyDemo demo = new EventFrequencyDemo("Event Frequency Demo"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }