JFREE error

hi.........

the code for making chart is: WHICH IS GIVING THE ERROR

import org.jfree.chart.*;
import org.jfree.data.category.*;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.xy.*;
import org.jfree.data.*;
import org.jfree.chart.renderer.category.*;
import org.jfree.chart.plot.*;
import java.awt.*;

public class BarExample1{
public static void main(String arg[]){
  DefaultCategoryDataset dataset = new DefaultCategoryDataset();
  dataset.setValue(2, "Marks", "Rahul");
  dataset.setValue(7, "Marks", "Vinod");
  dataset.setValue(4, "Marks", "Deepak");
  dataset.setValue(9, "Marks", "Prashant");
  dataset.setValue(6, "Marks", "Chandan");
  JFreeChart chart = ChartFactory.createBarChart
  ("BarChart using JFreeChart","Student", "Marks", dataset, 
   PlotOrientation.VERTICAL, false,true, false);
  chart.setBackgroundPaint(Color.yellow);
  chart.getTitle().setPaint(Color.blue); 
  CategoryPlot p = chart.getCategoryPlot(); 
  p.setRangeGridlinePaint(Color.red); 
  ChartFrame frame1=new ChartFrame("Bar Chart",chart);
  frame1.setVisible(true);
  frame1.setSize(400,350);
  }
}

IN THIS WE DONT REQUIRE THE RECTANGLEINSETS NA THEN WHY ITS GIVING ME THE ERROR.

tHE IMPORT FILE RECTANGLEINSETS IS NOT THERE IN THE JAR FILE.

SO HOW TO SOLVE THIS PROBLEM? PLZ HELP.

December 26, 2011 at 12:01 PM

Download jcommon-1.0.16.jar. This jar contains the required class file.