categorystepchartdemo1.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 5:13:40 PM
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// Decompiler options: packimports(3) 

package org.jfree.chart.demo;

import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JPanel;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.*;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.CategoryStepRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.*;

public class CategoryStepChartDemo1 extends ApplicationFrame
{

    public CategoryStepChartDemo1(String s)
    {
        super(s);
        CategoryDataset categorydataset = createDataset();
        JFreeChart jfreechart = createChart(categorydataset);
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setPreferredSize(new Dimension(500, 270));
        chartpanel.setEnforceFileExtensions(false);
        setContentPane(chartpanel);
    }

    private static CategoryDataset createDataset()
    {
        double ad[][] = {
            {
                1.0D, 4D, 3D, 5D, 5D, 7D, 7D, 8D
            }, {
                5D, 7D, 6D, 8D, 4D, 4D, 2D, 1.0D
            }, {
                4D, 3D, 2D, 3D, 6D, 3D, 4D, 3D
            }
        };
        CategoryDataset categorydataset = DatasetUtilities.createCategoryDataset("Series ", "Type ", ad);
        return categorydataset;
    }

    private static JFreeChart createChart(CategoryDataset categorydataset)
    {
        CategoryStepRenderer categorysteprenderer = new CategoryStepRenderer(true);
        CategoryAxis categoryaxis = new CategoryAxis("Category");
        NumberAxis numberaxis = new NumberAxis("Value");
        CategoryPlot categoryplot = new CategoryPlot(categorydataset, categoryaxis, numberaxis, categorysteprenderer);
        JFreeChart jfreechart = new JFreeChart("Category Step Chart", categoryplot);
        jfreechart.setBackgroundPaint(Color.white);
        categoryplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
        categoryplot.setBackgroundPaint(Color.lightGray);
        categoryplot.setDomainGridlinesVisible(true);
        categoryplot.setDomainGridlinePaint(Color.white);
        categoryplot.setRangeGridlinesVisible(true);
        categoryplot.setRangeGridlinePaint(Color.white);
        categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
        categoryaxis.setLowerMargin(0.0D);
        categoryaxis.setUpperMargin(0.0D);
        categoryaxis.addCategoryLabelToolTip("Type 1", "The first type.");
        categoryaxis.addCategoryLabelToolTip("Type 2", "The second type.");
        categoryaxis.addCategoryLabelToolTip("Type 3", "The third type.");
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        numberaxis.setLabelAngle(0.0D);
        return jfreechart;
    }

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

    public static void main(String args[])
    {
        CategoryStepChartDemo1 categorystepchartdemo1 = new CategoryStepChartDemo1("Category Step Renderer Demo");
        categorystepchartdemo1.pack();
        RefineryUtilities.centerFrameOnScreen(categorystepchartdemo1);
        categorystepchartdemo1.setVisible(true);
    }
}