import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.data.gantt.TaskSeriesCollection;
import org.jfree.data.gantt.TaskSeries;
import org.jfree.data.gantt.Task;

import java.util.Date;
import java.util.Calendar;

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

public class Test2_1 extends JFrame{
  public static void main(String[] args) {
    Test2_1 frame = new Test2_1();

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

  Test2_1(){
    JFreeChart chart = ChartFactory.createGanttChart("プロジェクト管理", 
                                                     "項目",
                                                     "日程",
                                                     createData(),
                                                     true, 
                                                     false, 
                                                     false);


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

  private TaskSeriesCollection createData(){
    TaskSeriesCollection data = new TaskSeriesCollection();

    TaskSeries series = new TaskSeries("計画");

    Task task1 = 
      new Task("要件定義", createData(2007, 3, 4), createData(2007, 3, 12));
    Task task2 = 
      new Task("設計", createData(2007, 3, 12), createData(2007, 3, 25));
    Task task3 = 
      new Task("開発", createData(2007, 4, 2), createData(2007, 4, 30));
    Task task4 = 
      new Task("テスト", createData(2007, 5, 1), createData(2007, 5, 10));

    series.add(task1);
    series.add(task2);
    series.add(task3);
    series.add(task4);

    data.add(series);

    return data;
  }

  private Date createData(int year, int month, int date){
    Calendar calendar = Calendar.getInstance();
    calendar.set(year, month - 1, date);
    return calendar.getTime();
  }
}