piechartdemo6.java

jfreechart1.0.6源程序,没有注释,不过都能运行起来

package demo;

import java.awt.*;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class PieChartDemo6 extends ApplicationFrame
{

    public PieChartDemo6(String s)
    {
        super(s);
        JPanel jpanel = createDemoPanel();
        jpanel.setPreferredSize(new Dimension(800, 600));
        setContentPane(jpanel);
    }

    private static PieDataset createDataset()
    {
        DefaultPieDataset defaultpiedataset = new DefaultPieDataset();
        defaultpiedataset.setValue("S1", 7D);
        defaultpiedataset.setValue("S2", null);
        defaultpiedataset.setValue("S3", 0.0D);
        defaultpiedataset.setValue("S4", 3D);
        defaultpiedataset.setValue("S5", -1D);
        return defaultpiedataset;
    }

    private static JFreeChart createChart(String s, PieDataset piedataset)
    {
        JFreeChart jfreechart = ChartFactory.createPieChart(s, piedataset, true, true, false);
        PiePlot pieplot = (PiePlot)jfreechart.getPlot();
        pieplot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0} = {1}"));
        return jfreechart;
    }

    public static JPanel createDemoPanel()
    {
        JPanel jpanel = new JPanel(new GridLayout(2, 2));
        JFreeChart jfreechart = createChart("Pie Chart 1", createDataset());
        Font font = new Font("Dialog", 0, 12);
        jfreechart.addSubtitle(new TextTitle("Ignore nulls: false; Ignore zeros: false;", font));
        JFreeChart jfreechart1 = createChart("Pie Chart 2", createDataset());
        jfreechart1.addSubtitle(new TextTitle("Ignore nulls: true; Ignore zeros: false;", font));
        PiePlot pieplot = (PiePlot)jfreechart1.getPlot();
        pieplot.setIgnoreNullValues(true);
        pieplot.setIgnoreZeroValues(false);
        JFreeChart jfreechart2 = createChart("Pie Chart 3", createDataset());
        jfreechart2.addSubtitle(new TextTitle("Ignore nulls: false; Ignore zeros: true;", font));
        PiePlot pieplot1 = (PiePlot)jfreechart2.getPlot();
        pieplot1.setIgnoreNullValues(false);
        pieplot1.setIgnoreZeroValues(true);
        JFreeChart jfreechart3 = createChart("Pie Chart 4", createDataset());
        jfreechart3.addSubtitle(new TextTitle("Ignore nulls: true; Ignore zeros: true;", font));
        PiePlot pieplot2 = (PiePlot)jfreechart3.getPlot();
        pieplot2.setIgnoreNullValues(true);
        pieplot2.setIgnoreZeroValues(true);
        jpanel.add(new ChartPanel(jfreechart));
        jpanel.add(new ChartPanel(jfreechart1));
        jpanel.add(new ChartPanel(jfreechart2));
        jpanel.add(new ChartPanel(jfreechart3));
        return jpanel;
    }

    public static void main(String args[])
    {
        PieChartDemo6 piechartdemo6 = new PieChartDemo6("Pie Chart Demo 6");
        piechartdemo6.pack();
        RefineryUtilities.centerFrameOnScreen(piechartdemo6);
        piechartdemo6.setVisible(true);
    }
}