stackedareachartdemo.java

大家打开看看啊, 很有用的东西

/* ======================================
 * JFreeChart : a free Java chart library
 * ======================================
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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.
 *
 * -------------------------
 * StackedAreaChartDemo.java
 * -------------------------
 * (C) Copyright 2002, 2003, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: StackedAreaChartDemo.java,v 1.12 2003/07/10 14:18:10 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.CategoryItemRenderer;
import org.jfree.data.CategoryDataset;
import org.jfree.data.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 TableDataset}.
 *
 * @author David Gilbert
 */
public class StackedAreaChartDemo extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public StackedAreaChartDemo(String title) {

        super(title);

        // create a dataset...
        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 }};

        CategoryDataset dataset = DatasetUtilities.createCategoryDataset("Series ", "Type ", data);

        // create the chart...
        JFreeChart chart = ChartFactory.createStackedAreaChart(
            "Stacked Area Chart",      // chart title
            "Category",                // domain axis label
            "Value",                   // range axis label
            dataset,                   // data
            PlotOrientation.HORIZONTAL,  // orientation
            true,                      // include legend
            true,
            false
        );

        // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

        // set the background color for the chart...
        chart.setBackgroundPaint(Color.yellow);

        // get a reference to the plot for further customisation...
        CategoryPlot plot = chart.getCategoryPlot();
        plot.setForegroundAlpha(0.5f);

        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setVerticalCategoryLabels(true);
        domainAxis.setLowerMargin(0.0);
        domainAxis.setUpperMargin(0.0);

        // change the auto tick unit selection to integer units only...
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

        CategoryItemRenderer renderer = plot.getRenderer();
        renderer.setItemLabelsVisible(Boolean.TRUE);

        // OPTIONAL CUSTOMISATION COMPLETED.

        // add the chart to a panel...
        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(String[] args) {

        StackedAreaChartDemo demo = new StackedAreaChartDemo("Stacked Area Chart Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}