Test

package mine.test;

import org.jfree.chart.ChartPanel;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.xy.XIntervalSeries;
import org.jfree.data.xy.XIntervalSeriesCollection;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class Test extends ApplicationFrame {

   /**
     *
     */
    private static final long serialVersionUID = 1L;
    private ExecutorService executor;
    XIntervalSeries dataset;

    public Test( String applicationTitle , String chartTitle ) {
      super(applicationTitle);

      JFreeChart lineChart = ChartFactory.createXYLineChart(
         chartTitle,
         "X Values","Y Values",
         createDataset(),
         PlotOrientation.VERTICAL,
         true,true,false);

      ChartPanel chartPanel = new ChartPanel( lineChart );
      chartPanel.setPreferredSize( new java.awt.Dimension( 560 , 367 ) );
      setContentPane( chartPanel );
   }

   private XIntervalSeriesCollection createDataset( ) {
      dataset = new XIntervalSeries( "XYGraph" );
      XIntervalSeriesCollection data = new XIntervalSeriesCollection();
      data.addSeries( dataset );
      startTask();
      return data;
   }

   private void startTask() {
       executor = Executors.newCachedThreadPool();
       executor.execute( new DataTask( -10, 20, 2, this ) );
    }

   public static void main( String[ ] args ) {
      Test chart = new Test(
         "X Vs Y" ,
         "Graph Of A Parabola");

      chart.pack( );
      RefineryUtilities.centerFrameOnScreen( chart );
      chart.setVisible( true );
   }
}