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.] * * -------------------- * ParetoChartDemo.java * -------------------- * (C) Copyright 2003, 2004, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited). * Contributor(s): -; * * $Id: ParetoChartDemo.java,v 1.21 2004/04/30 11:18:56 mungady Exp $ * * Changes * ------- * 05-Mar-2003 : Version 1 (DG); * 27-Aug-2003 : Moved SortOrder from org.jfree.data --> org.jfree.util (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import java.text.NumberFormat; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.DatasetRenderingOrder; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.LineAndShapeRenderer; import org.jfree.chart.title.TextTitle; import org.jfree.data.DataUtilities; import org.jfree.data.DefaultKeyedValues; import org.jfree.data.KeyedValues; import org.jfree.data.category.CategoryDataset; import org.jfree.data.general.DatasetUtilities; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; import org.jfree.util.SortOrder; /** * A demo showing the creation of a pareto chart. * */ public class ParetoChartDemo extends ApplicationFrame { /** * Creates a new demo instance. * * @param title the frame title. */ public ParetoChartDemo(final String title) { super(title); final DefaultKeyedValues data = new DefaultKeyedValues(); data.addValue("C", new Integer(4843)); data.addValue("C++", new Integer(2098)); data.addValue("C#", new Integer(26)); data.addValue("Java", new Integer(1901)); data.addValue("Perl", new Integer(2507)); data.addValue("PHP", new Integer(1689)); data.addValue("Python", new Integer(948)); data.addValue("Ruby", new Integer(100)); data.addValue("SQL", new Integer(263)); data.addValue("Unix Shell", new Integer(485)); data.sortByValues(SortOrder.DESCENDING); final KeyedValues cumulative = DataUtilities.getCumulativePercentages(data); final CategoryDataset dataset = DatasetUtilities.createCategoryDataset("Languages", data); // create the chart... final JFreeChart chart = ChartFactory.createBarChart("Freshmeat Software Projects", // chart title "Language", // domain axis label "Projects", // range axis label dataset, // data PlotOrientation.VERTICAL, true, // include legend true, false); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... chart.addSubtitle(new TextTitle("By Programming Language")); chart.addSubtitle(new TextTitle("As at 5 March 2003")); // set the background color for the chart... chart.setBackgroundPaint(new Color(0xBBBBDD)); // get a reference to the plot for further customisation... final CategoryPlot plot = chart.getCategoryPlot(); final CategoryAxis domainAxis = plot.getDomainAxis(); domainAxis.setLowerMargin(0.02); domainAxis.setUpperMargin(0.02); // set the range axis to display integers only... final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); final LineAndShapeRenderer renderer2 = new LineAndShapeRenderer(); final CategoryDataset dataset2 = DatasetUtilities.createCategoryDataset("Cumulative", cumulative); final NumberAxis axis2 = new NumberAxis("Percent"); axis2.setNumberFormatOverride(NumberFormat.getPercentInstance()); plot.setRangeAxis(1, axis2); plot.setDataset(1, dataset2); plot.setRenderer(1, renderer2); plot.mapDatasetToRangeAxis(1, 1); plot.setDatasetRenderingOrder(DatasetRenderingOrder.REVERSE); // OPTIONAL CUSTOMISATION COMPLETED. // add the chart to a panel... final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(550, 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 ParetoChartDemo demo = new ParetoChartDemo("Pareto Chart Demo"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }