JFreeChart饼图实战教程：简单示例

package com.test.jfreechart;

import java.awt.Font;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;

public class JFreeChartTest2 extends ApplicationFrame
{
    public JFreeChartTest2(String title)
    {
        super(title);
        this.setContentPane(createPanel()); //构造函数中自动创建Java的panel面板
    }
    
    public static CategoryDataset createDataset() //创建柱状图数据集
    {
        DefaultCategoryDataset dataset=new DefaultCategoryDataset();
        dataset.setValue(10,"a","管理人员");
        dataset.setValue(20,"b","市场人员");