Java/Chart/Area Stacked Chart

JFreeChart: Stacked Area 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.]
*
* -------------------------
* StackedAreaChartDemo.java
* -------------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: StackedAreaChartDemo.java,v 1.23 2004/04/29 16:24:03 mungady Exp $
*
* Changes
* -------
* 23-Sep-2002 : Version 1 (DG);
* 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/

package org.jfree.chart.demo; import java.awt.Color; 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.PlotOrientation; import org.jfree.chart.renderer.category.CategoryItemRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.general.DatasetUtilities; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A simple demonstration application showing how to create a stacked area chart using data from a
* {@link CategoryDataset}.
*/

public class StackedAreaChartDemo extends ApplicationFrame {

   /**
    * Creates a new demo.
    *
    * @param title  the frame title.
    */
   public StackedAreaChartDemo(final String title) {
       super(title);
       CategoryDataset dataset = createDataset();
       JFreeChart chart = createChart(dataset);
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       setContentPane(chartPanel);
   }
   
   /**
    * Creates a sample dataset.
    * 
    * @return A sample dataset.
    */
   public CategoryDataset createDataset() {
       final double[][] data = new double[][] {
           {1.0, 4.0, 3.0, 5.0, 5.0, 7.0, 7.0, 8.0 },
           {5.0, 7.0, 6.0, 8.0, 4.0, 4.0, 2.0, 1.0 },
           {4.0, 3.0, 2.0, 3.0, 6.0, 3.0, 4.0, 3.0 }
       };
       final CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
           "Series ", "Type ", data
       );
       return dataset;
   }
   
   /**
    * Creates a sample chart.
    * 
    * @param dataset  the dataset.
    * 
    * @return A sample chart.
    */
   public JFreeChart createChart(CategoryDataset dataset) {
       
       final JFreeChart chart = ChartFactory.createStackedAreaChart(
           "Stacked Area Chart",      // chart title
           "Category",                // domain axis label
           "Value",                   // range axis label
           dataset,                   // data
           PlotOrientation.VERTICAL,  // orientation
           true,                      // include legend
           true,
           false
       );
       chart.setBackgroundPaint(Color.white);
       final CategoryPlot plot = (CategoryPlot) chart.getPlot();
       plot.setForegroundAlpha(0.5f);
       plot.setBackgroundPaint(Color.lightGray);
       plot.setDomainGridlinePaint(Color.white);
       plot.setRangeGridlinePaint(Color.white);
       
       final CategoryAxis domainAxis = plot.getDomainAxis();
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);
       // change the auto tick unit selection to integer units only...
       final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
       rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
       final CategoryItemRenderer renderer = plot.getRenderer();
       renderer.setItemLabelsVisible(true);
       
       return chart;
  
   }
   // ****************************************************************************
   // * 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 StackedAreaChartDemo demo = new StackedAreaChartDemo("Stacked Area Chart Demo");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>