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Текущая версия на 09:52, 1 июня 2010

JFreeChart: Pare to Chart Demo

   <source lang="java">

/* ===========================================================

* 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.ru/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);
   }

}

      </source>