import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.data.general.DefaultPieDataset;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import org.jfree.chart.ChartPanel;

public class Test3_1 extends JFrame{
  public static void main(String[] args) {
    Test3_1 frame = new Test3_1();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 500, 400);
    frame.setTitle("グラフサンプル");
    frame.setVisible(true);
  }

  Test3_1(){
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Java", 20);
    data.setValue("PHP", 40);
    data.setValue("Ruby", 25);
    data.setValue("Perl", 10);
    data.setValue("Python", 5);

    JFreeChart chart = 
      ChartFactory.createPieChart3D("主に使う言語",
                                   data,
                                   true,
                                   false,
                                   false);

    ChartPanel cpanel = new ChartPanel(chart);
    getContentPane().add(cpanel, BorderLayout.CENTER);
  }
}