private static JFreeChart createAreaChart() {
Number[][] data = new Integer[][]
{{new Integer(-3), new Integer(-2)},
{new Integer(-1), new Integer(1)},
{new Integer(2), new Integer(3)}};
CategoryDataset dataset = DatasetUtilities.createCategoryDataset("S",
"C", data);
return ChartFactory.createAreaChart("Area Chart", "Domain", "Range",
dataset, PlotOrientation.HORIZONTAL, true, true, true);
}