[jCharts-users] Line Chart Sample not working

[David H. <Dav...@na...>]

I cut and pasted the line chart sample that came with the User's 
Guide.  The program compiles fine, but it doesn't draw anything.  Do 
I need to call some more APIs before I can draw a line chart?  Here's 
my program.  I'd appreciate for any help.  Thanks much in advance.


import org.jCharts.Chart;
import org.jCharts.axisChart.AxisChart;
import org.jCharts.chartData.DataSeries;
import org.jCharts.chartData.DataSet;
import org.jCharts.chartData.AxisChartDataSet;
import org.jCharts.types.ChartType;
import org.jCharts.properties.*;
import org.jCharts.properties.LineChartProperties;
import org.jCharts.properties.PointChartProperties;
import org.jCharts.chartData.ChartDataException;

import javax.swing.*;
import java.awt.*;
import java.awt.event.WindowEvent;

public class LineChart extends JFrame
{
    private JPanel panel;
    private static int width = 450;
    private static int height = 450;

    private void LineChart () throws ChartDataException, PropertyException
    {
       initComponents();
    }


    private void initComponents() throws ChartDataException, PropertyException
    {
       this.setSize( width, height );
       this.panel = new JPanel( true );
       this.panel.setSize( width, height );
       this.getContentPane().add( this.panel );
       this.setVisible( true );

       String[] xAxisLabels = { "1998", "1999", "2000", "2001",
                                "2002", "2003", "2004" };
       String xAxisTitle = "Years";
       String yAxisTitle = "Problems";
       String title = "Micro$haft at Work";
       DataSeries dataSeries = new DataSeries(xAxisLabels, xAxisTitle,
                                              yAxisTitle, title );

       double[][] data = new double[][]{ { 250, 45, -36, 66, 145, 80, 55 } };
       String[] legendLabels = { "Bugs" };
       Paint[] paints = {Color.blue};

       Stroke[] strokes= { LineChartProperties.DEFAULT_LINE_STROKE };
       Shape[] shapes= { PointChartProperties.SHAPE_CIRCLE };
       LineChartProperties properties = new 
LineChartProperties(strokes, shapes);

       AxisChartDataSet axisChartDataSet =
              new AxisChartDataSet(data, legendLabels, paints, ChartType.LINE,
                                   properties );
       dataSeries.addIAxisPlotDataSet (axisChartDataSet);

       ChartProperties chartProperties   = new ChartProperties();
       AxisProperties axisProperties     = new AxisProperties();
       LegendProperties legendProperties = new LegendProperties();

       AxisChart axisChart= new AxisChart(dataSeries, chartProperties,
                                          axisProperties, legendProperties,
                                          width, height);


       addWindowListener( new java.awt.event.WindowAdapter()
       {
            public void windowClosing( WindowEvent windowEvent )
            {
               System.exit( 0 );
            }
        }
        );
    }


    /*********************************************************************
     *  Main
     *********************************************************************/
    public static void main (String args[] )
                throws ChartDataException, PropertyException
    {
       new LineChart();
    }
}

-- 
David Han
dav...@gs...
301-286-3617