Hi Friend,

To create a simple Gantt chart, try the following code:

import java.awt.Color;
import java.util.Date;
import java.util.Calendar;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.*;
import org.jfree.chart.JFreeChart;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.data.gantt.Task;
import org.jfree.data.gantt.TaskSeries;
import org.jfree.data.gantt.TaskSeriesCollection;
import org.jfree.data.time.SimpleTimePeriod;


public class GanttChartExample {
private static Date date( int day, int month, int year) {

Calendar calendar = Calendar.getInstance();
calendar.set(year, month, day);
Date result = calendar.getTime();
return result;
}
public static void main( String[] args) {


TaskSeries schedule1 = new TaskSeries("Scheduled Tasks");
schedule1.add(new Task("Feasibility Study",
new SimpleTimePeriod(date(1, Calendar.JANUARY, 2008),
date(10, Calendar.JANUARY, 2008))));
schedule1.add(new Task("Requirement Analysis",
new SimpleTimePeriod(date(11, Calendar.JANUARY, 2008),
date(21, Calendar.JANUARY, 2008))));
schedule1.add(new Task("Designing",
new SimpleTimePeriod(date(22, Calendar.FEBRUARY, 2008),
date(21, Calendar.MARCH, 2008))));
schedule1.add(new Task("Coding",
new SimpleTimePeriod(date(22, Calendar.MARCH, 2008),
date(30, Calendar.MAY, 2008))));
schedule1.add(new Task("Testing",
new SimpleTimePeriod(date(2, Calendar.JUNE, 2008),
date(18, Calendar.JUNE, 2008))));
schedule1.add(new Task("Implementation",
new SimpleTimePeriod(date(19, Calendar.JUNE, 2008),
date(31, Calendar.JULY, 2008))));
schedule1.add(new Task("Post Implementation",
new SimpleTimePeriod(date(1, Calendar.AUGUST, 2008),
date(1, Calendar.NOVEMBER, 2008))));

TaskSeries schedule2 = new TaskSeries("Actual Done");
schedule2.add(new Task("Feasibility Study",
new SimpleTimePeriod(date(1, Calendar.JANUARY, 2008),
date(15, Calendar.JANUARY, 2008))));
schedule2.add(new Task("Requirement Analysis",
new SimpleTimePeriod(date(16, Calendar.JANUARY, 2008),
date(29, Calendar.JANUARY, 2008))));
schedule2.add(new Task("Designing",
new SimpleTimePeriod(date(22, Calendar.FEBRUARY, 2008),
date(30, Calendar.MARCH, 2008))));
schedule2.add(new Task("Coding",
new SimpleTimePeriod(date(1, Calendar.APRIL, 2008),
date(20, Calendar.JUNE, 2008))));
schedule2.add(new Task("Testing",
new SimpleTimePeriod(date(21, Calendar.JUNE, 2008),
date(8, Calendar.JULY, 2008))));
schedule2.add(new Task("Implementation",
new SimpleTimePeriod(date(9, Calendar.JULY, 2008),
date(23, Calendar.AUGUST, 2008))));
schedule2.add(new Task("Post Implementation",
new SimpleTimePeriod(date(1, Calendar.SEPTEMBER, 2008),
date(10, Calendar.DECEMBER, 2008))));

continue..........

TaskSeriesCollection collection = new TaskSeriesCollection();
collection.add(schedule1);
collection.add(schedule2);
IntervalCategoryDataset dataset= collection;

JFreeChart chart = ChartFactory.createGanttChart(
"Gantt Chart Example", // chart Heading
"Task", // X-axis label
"Date", // Y-axis label
dataset, // dataset
true, // legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(new Color(0xff,0xff,0xcc));
ChartFrame frame=new ChartFrame("Gantt Chart",chart);
frame.setVisible(true);
frame.setSize(400,350);
}
}

Thanks

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