histogramdemo2.java

jfreechart1.0.6源程序,没有注释,不过都能运行起来

package demo;

import java.awt.Dimension;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.data.statistics.SimpleHistogramBin;
import org.jfree.data.statistics.SimpleHistogramDataset;
import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class HistogramDemo2 extends ApplicationFrame
{

    public HistogramDemo2(String s)
    {
        super(s);
        JPanel jpanel = createDemoPanel();
        jpanel.setPreferredSize(new Dimension(500, 270));
        setContentPane(jpanel);
    }

    private static IntervalXYDataset createDataset()
    {
        SimpleHistogramDataset simplehistogramdataset = new SimpleHistogramDataset("Series 1");
        SimpleHistogramBin simplehistogrambin = new SimpleHistogramBin(0.0D, 1.0D, true, false);
        SimpleHistogramBin simplehistogrambin1 = new SimpleHistogramBin(1.0D, 2D, true, false);
        SimpleHistogramBin simplehistogrambin2 = new SimpleHistogramBin(2D, 3D, true, false);
        SimpleHistogramBin simplehistogrambin3 = new SimpleHistogramBin(3D, 4D, true, true);
        simplehistogrambin.setItemCount(1);
        simplehistogrambin1.setItemCount(10);
        simplehistogrambin2.setItemCount(15);
        simplehistogrambin3.setItemCount(20);
        simplehistogramdataset.addBin(simplehistogrambin);
        simplehistogramdataset.addBin(simplehistogrambin1);
        simplehistogramdataset.addBin(simplehistogrambin2);
        simplehistogramdataset.addBin(simplehistogrambin3);
        return simplehistogramdataset;
    }

    private static JFreeChart createChart(IntervalXYDataset intervalxydataset)
    {
        JFreeChart jfreechart = ChartFactory.createHistogram("Histogram Demo", null, null, intervalxydataset, PlotOrientation.VERTICAL, true, true, false);
        XYPlot xyplot = (XYPlot)jfreechart.getPlot();
        xyplot.setForegroundAlpha(0.85F);
        XYBarRenderer xybarrenderer = (XYBarRenderer)xyplot.getRenderer();
        xybarrenderer.setDrawBarOutline(false);
        return jfreechart;
    }

    public static JPanel createDemoPanel()
    {
        JFreeChart jfreechart = createChart(createDataset());
        return new ChartPanel(jfreechart);
    }

    public static void main(String args[])
    {
        HistogramDemo2 histogramdemo2 = new HistogramDemo2("Histogram Demo 2");
        histogramdemo2.pack();
        RefineryUtilities.centerFrameOnScreen(histogramdemo2);
        histogramdemo2.setVisible(true);
    }
}