barchartdemo9.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.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.*;

public class BarChartDemo9 extends ApplicationFrame
{
    static class CustomBarRenderer extends BarRenderer
    {

        public Paint getItemPaint(int i, int j)
        {
            return colors[j % colors.length];
        }

        private Paint colors[];

        public CustomBarRenderer(Paint apaint[])
        {
            colors = apaint;
        }
    }


    public BarChartDemo9(String s)
    {
        super(s);
        CategoryDataset categorydataset = createDataset();
        JFreeChart jfreechart = createChart(categorydataset);
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setPreferredSize(new Dimension(500, 270));
        setContentPane(chartpanel);
    }

    private static CategoryDataset createDataset()
    {
        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
        defaultcategorydataset.addValue(410D, "Network Traffic", "Monday");
        defaultcategorydataset.addValue(680D, "Network Traffic", "Tuesday");
        defaultcategorydataset.addValue(530D, "Network Traffic", "Wednesday");
        defaultcategorydataset.addValue(570D, "Network Traffic", "Thursday");
        defaultcategorydataset.addValue(330D, "Network Traffic", "Friday");
        return defaultcategorydataset;
    }

    private static JFreeChart createChart(CategoryDataset categorydataset)
    {
        JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo 9", null, "Value", categorydataset, PlotOrientation.VERTICAL, false, true, false);
        TextTitle texttitle = jfreechart.getTitle();
        texttitle.setBorder(0.0D, 0.0D, 1.0D, 0.0D);
        texttitle.setBackgroundPaint(new GradientPaint(0.0F, 0.0F, Color.red, 350F, 0.0F, Color.white, true));
        texttitle.setExpandToFitSpace(true);
        jfreechart.setBackgroundPaint(new GradientPaint(0.0F, 0.0F, Color.yellow, 350F, 0.0F, Color.white, true));
        CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
        categoryplot.setNoDataMessage("NO DATA!");
        categoryplot.setBackgroundPaint(null);
        categoryplot.setInsets(new RectangleInsets(10D, 5D, 5D, 5D));
        categoryplot.setOutlinePaint(Color.black);
        categoryplot.setRangeGridlinePaint(Color.gray);
        categoryplot.setRangeGridlineStroke(new BasicStroke(1.0F));
        Paint apaint[] = createPaint();
        CustomBarRenderer custombarrenderer = new CustomBarRenderer(apaint);
        custombarrenderer.setGradientPaintTransformer(new StandardGradientPaintTransformer(GradientPaintTransformType.CENTER_HORIZONTAL));
        categoryplot.setRenderer(custombarrenderer);
        NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        numberaxis.setRange(0.0D, 800D);
        numberaxis.setTickMarkPaint(Color.black);
        return jfreechart;
    }

    private static Paint[] createPaint()
    {
        Paint apaint[] = new Paint[5];
        apaint[0] = new GradientPaint(0.0F, 0.0F, Color.white, 0.0F, 0.0F, Color.red);
        apaint[1] = new GradientPaint(0.0F, 0.0F, Color.white, 0.0F, 0.0F, Color.green);
        apaint[2] = new GradientPaint(0.0F, 0.0F, Color.white, 0.0F, 0.0F, Color.blue);
        apaint[3] = new GradientPaint(0.0F, 0.0F, Color.white, 0.0F, 0.0F, Color.orange);
        apaint[4] = new GradientPaint(0.0F, 0.0F, Color.white, 0.0F, 0.0F, Color.magenta);
        return apaint;
    }

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

    public static void main(String args[])
    {
        BarChartDemo9 barchartdemo9 = new BarChartDemo9("Bar Chart Demo 9");
        barchartdemo9.pack();
        RefineryUtilities.centerFrameOnScreen(barchartdemo9);
        barchartdemo9.setVisible(true);
    }
}