barchartdemo4.java

很好的制作统计图表的代码

// Decompiled by DJ v3.7.7.81 Copyright 2004 Atanas Neshkov  Date: 7/18/2005 5:13:39 PM
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// Decompiler options: packimports(3) 

package org.jfree.chart.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.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class BarChartDemo4 extends ApplicationFrame
{

    public BarChartDemo4(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()
    {
        String s = "First";
        String s1 = "Second";
        String s2 = "Category 1";
        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
        defaultcategorydataset.addValue(1.0D, s, s2);
        defaultcategorydataset.addValue(5D, s1, s2);
        return defaultcategorydataset;
    }

    private static JFreeChart createChart(CategoryDataset categorydataset)
    {
        JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo", "Category", "Value", categorydataset, PlotOrientation.VERTICAL, true, true, false);
        jfreechart.setBackgroundPaint(new Color(0xbbbbdd));
        CategoryPlot categoryplot = jfreechart.getCategoryPlot();
        NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        BarRenderer barrenderer = (BarRenderer)categoryplot.getRenderer();
        barrenderer.setDrawBarOutline(false);
        barrenderer.setMaxBarWidth(0.10000000000000001D);
        GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue, 0.0F, 0.0F, Color.lightGray);
        GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green, 0.0F, 0.0F, Color.lightGray);
        barrenderer.setSeriesPaint(0, gradientpaint);
        barrenderer.setSeriesPaint(1, gradientpaint1);
        return jfreechart;
    }

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

    public static void main(String args[])
    {
        BarChartDemo4 barchartdemo4 = new BarChartDemo4("Bar Chart Demo 4");
        barchartdemo4.pack();
        RefineryUtilities.centerFrameOnScreen(barchartdemo4);
        barchartdemo4.setVisible(true);
    }
}