How to use XY chart of JFreeChart? Or any other choice?!

http://forum.java.sun.com/thread.jspa?threadID=633861&messageID=3677325

import java.awt.*;
import java.text.*;
import javax.swing.*;
import org.jfree.chart.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.labels.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.xy.*;
import org.jfree.chart.title.*;
import org.jfree.data.time.*;
import org.jfree.data.xy.*;
import org.jfree.ui.*;
public class XYBarChartDemo1 extends ApplicationFrame{
    public XYBarChartDemo1(String s){
        super(s);
        IntervalXYDataset intervalxydataset = createDataset();
        JFreeChart jfreechart = createChart(intervalxydataset);
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setPreferredSize(new Dimension(500, 300));
        setContentPane(chartpanel);
    }
    private static JFreeChart createChart(IntervalXYDataset intervalxydataset){
        JFreeChart jfreechart = ChartFactory.createXYBarChart("State Executions - USA", "Year", true, "Number of People", intervalxydataset, PlotOrientation.VERTICAL, true, false, false);
        jfreechart.addSubtitle(new TextTitle("Source: http://www.amnestyusa.org/abolish/listbyyear.do"));
        jfreechart.setBackgroundPaint(Color.white);
        XYPlot xyplot = jfreechart.getXYPlot();
        XYItemRenderer xyitemrenderer = xyplot.getRenderer();
        StandardXYToolTipGenerator standardxytooltipgenerator = new StandardXYToolTipGenerator("{1} = {2}", new SimpleDateFormat("yyyy"), new DecimalFormat("0"));
        xyitemrenderer.setToolTipGenerator(standardxytooltipgenerator);
        xyplot.setBackgroundPaint(Color.lightGray);
        xyplot.setRangeGridlinePaint(Color.white);
        DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
        dateaxis.setTickMarkPosition(DateTickMarkPosition.MIDDLE);
        dateaxis.setLowerMargin(0.01D);
        dateaxis.setUpperMargin(0.01D);
        return jfreechart;
    }
    private static IntervalXYDataset createDataset(){
        TimeSeries timeseries = new TimeSeries("Executions", "Year", "Count", org.jfree.data.time.Year.class);
        try{
            timeseries.add(new Year(1976), new Integer(0));
            timeseries.add(new Year(1977), new Integer(1));
            timeseries.add(new Year(1978), new Integer(0));
            timeseries.add(new Year(1979), new Integer(2));
            timeseries.add(new Year(1980), new Integer(0));
            timeseries.add(new Year(1981), new Integer(1));
            timeseries.add(new Year(1982), new Integer(2));
            timeseries.add(new Year(1983), new Integer(5));
            timeseries.add(new Year(1984), new Integer(21));
            timeseries.add(new Year(1985), new Integer(18));
            timeseries.add(new Year(1986), new Integer(18));
            timeseries.add(new Year(1987), new Integer(25));
            timeseries.add(new Year(1988), new Integer(11));
            timeseries.add(new Year(1989), new Integer(16));
            timeseries.add(new Year(1990), new Integer(23));
            timeseries.add(new Year(1991), new Integer(14));
            timeseries.add(new Year(1992), new Integer(31));
            timeseries.add(new Year(1993), new Integer(38));
            timeseries.add(new Year(1994), new Integer(31));
            timeseries.add(new Year(1995), new Integer(56));
            timeseries.add(new Year(1996), new Integer(45));
            timeseries.add(new Year(1997), new Integer(74));
            timeseries.add(new Year(1998), new Integer(68));
            timeseries.add(new Year(1999), new Integer(98));
            timeseries.add(new Year(2000), new Integer(85));
            timeseries.add(new Year(2001), new Integer(66));
            timeseries.add(new Year(2002), new Integer(71));
            timeseries.add(new Year(2003), new Integer(65));
        }
        catch(Exception exception){
            System.err.println(exception.getMessage());
        }
        TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(timeseries);
        timeseriescollection.setDomainIsPointsInTime(false);
        return timeseriescollection;
    }
    public static JPanel createDemoPanel(){
        return new ChartPanel(createChart(createDataset()));
    }
    public static void main(String args[]){
        XYBarChartDemo1 xybarchartdemo1 = new XYBarChartDemo1("State Executions - USA");
        xybarchartdemo1.pack();
        RefineryUtilities.centerFrameOnScreen(xybarchartdemo1);
        xybarchartdemo1.setVisible(true);
    }
}