stackedareachartdemo.java

jfreechart1.0.6源程序,没有注释,不过都能运行起来

package demo;

import java.awt.Color;
import java.awt.Dimension;
import org.jfree.chart.*;
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.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class StackedAreaChartDemo extends ApplicationFrame
{

    public StackedAreaChartDemo(String s)
    {
        super(s);
        CategoryDataset categorydataset = createDataset();
        JFreeChart jfreechart = createChart(categorydataset);
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setPreferredSize(new Dimension(500, 270));
        setContentPane(chartpanel);
    }

    public CategoryDataset createDataset()
    {
        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
        defaultcategorydataset.addValue(1.0D, "S1", "C1");
        defaultcategorydataset.addValue(2D, "S1", "C2");
        defaultcategorydataset.addValue(3D, "S1", "C3");
        defaultcategorydataset.addValue(4D, "S1", "C4");
        defaultcategorydataset.addValue(5D, "S1", "C5");
        defaultcategorydataset.addValue(6D, "S1", "C6");
        defaultcategorydataset.addValue(7D, "S1", "C7");
        defaultcategorydataset.addValue(8D, "S1", "C8");
        defaultcategorydataset.addValue(3D, "S2", "C1");
        defaultcategorydataset.addValue(3D, "S2", "C2");
        defaultcategorydataset.addValue(-3D, "S2", "C3");
        defaultcategorydataset.addValue(3D, "S2", "C4");
        defaultcategorydataset.addValue(3D, "S2", "C5");
        defaultcategorydataset.addValue(3D, "S2", "C6");
        defaultcategorydataset.addValue(3D, "S2", "C7");
        defaultcategorydataset.addValue(3D, "S2", "C8");
        defaultcategorydataset.addValue(8D, "S3", "C1");
        defaultcategorydataset.addValue(7D, "S3", "C2");
        defaultcategorydataset.addValue(-6D, "S3", "C3");
        defaultcategorydataset.addValue(5D, "S3", "C4");
        defaultcategorydataset.addValue(4D, "S3", "C5");
        defaultcategorydataset.addValue(3D, "S3", "C6");
        defaultcategorydataset.addValue(2D, "S3", "C7");
        defaultcategorydataset.addValue(1.0D, "S3", "C8");
        return defaultcategorydataset;
    }

    public JFreeChart createChart(CategoryDataset categorydataset)
    {
        JFreeChart jfreechart = ChartFactory.createStackedAreaChart("Stacked Area Chart", "Category", "Value", categorydataset, PlotOrientation.VERTICAL, true, true, false);
        jfreechart.setBackgroundPaint(Color.white);
        CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
        categoryplot.setForegroundAlpha(0.85F);
        categoryplot.setBackgroundPaint(Color.lightGray);
        categoryplot.setDomainGridlinePaint(Color.white);
        categoryplot.setRangeGridlinePaint(Color.white);
        CategoryAxis categoryaxis = categoryplot.getDomainAxis();
        categoryaxis.setLowerMargin(0.0D);
        categoryaxis.setUpperMargin(0.0D);
        categoryaxis.setCategoryMargin(0.0D);
        NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        CategoryItemRenderer categoryitemrenderer = categoryplot.getRenderer();
        categoryitemrenderer.setBaseItemLabelsVisible(true);
        return jfreechart;
    }

    public static void main(String args[])
    {
        StackedAreaChartDemo stackedareachartdemo = new StackedAreaChartDemo("Stacked Area Chart Demo");
        stackedareachartdemo.pack();
        RefineryUtilities.centerFrameOnScreen(stackedareachartdemo);
        stackedareachartdemo.setVisible(true);
    }
}