[jCharts-users] getting started

[Christian C. <chr...@gr...>]

Hi folks,

I'm obviously doing something stupid, so maybe you can help me... Here's my
code snippet, taken from the samples:
----------------------------------
BarChartProperties barChartProperties = null;
LegendProperties legendProperties = null;
AxisProperties axisProperties = null;
ChartProperties chartProperties = null;
int width = 550;
int height = 360;

try {
    String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000",
"2001", "2002", "2003", "2004"};
    String xAxisTitle = "Years";
    String yAxisTitle = "Problems";
    String title = "Micro$oft At Work";
    IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle,
yAxisTitle, title );

    double[][] data = new double[][]{{1500, 6880, 4510, 2600, 1200, 1580,
8000, 4555, 4000, 6120}};
    String[] legendLabels = {"Bugs"};
    Paint[] paints = new Paint[]{Color.blue.darker()};
    dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data,
legendLabels, paints, ChartType.BAR, barChartProperties ) );
    AxisChart axisChart = new AxisChart( dataSeries, chartProperties,
axisProperties, legendProperties, width, height);

    ...
    ServletEncoderHelper.encodePNG(axisChart, httpServletResponse);
    ...

catch(ChartDataException chartDataException) {
    chartDataException.printStackTrace();
}
----------------------------------

Notice that I am _not_ calling renderWithImageMap(), getImageMap(), etc the
way the sample is. Instead, I'm trying to use the chart normally, just as an
image.

The problem occurs within encodePNG()...it basically throws a null pointer
exception, and because the code was apparently compiled without line
numbers, I don't get a whole lot for debugging...

Now, I tried a simple pie chart example, and that _did_ work...so obviously,
I am doing something specifically wrong here. Does anyone have any ideas? Or
do I have to go build the project from source in order to get line numbers
and then track it down from there.

Any suggestions would be greatly appreciated...

tia,
Christian
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Christian Cryder
Internet Architect, ATMReports.com
Project Chair, BarracudaMVC - http://barracudamvc.org
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"Coffee? I could quit anytime, just not today"