src/org/tiefaces/components/websheet/chart/ChartHelper.java
public JFreeChart createAreaChart(final ChartData chartData) {
		PlotOrientation orientation = PlotOrientation.VERTICAL;
		// create the chart...
		final JFreeChart chart = ChartFactory.createAreaChart(
				chartData.getTitle(), // chart title
				chartData.getCatAx().getTitle(), // x axis label
				chartData.getValAx().getTitle(), // y axis label
				createDataset(chartData), // data
				orientation, true, // include legend
				false, // tooltips
				false // urls
		);

		setupStyle(chart, chartData);

		return chart;

	}
public JFreeChart createAreaChart(final ChartData chartData) {
		PlotOrientation orientation = PlotOrientation.VERTICAL;
		// create the chart...
		final JFreeChart chart = ChartFactory.createAreaChart(
				chartData.getTitle(), // chart title
				chartData.getCatAx().getTitle(), // x axis label
				chartData.getValAx().getTitle(), // y axis label
				createDataset(chartData), // data
				orientation, true, // include legend
				false, // tooltips
				false // urls
		);

		setupStyle(chart, chartData);

		return chart;

	}
Create jfree bar chart.

@param chartData
contain information gathered from excel chart object.
@return jfree line chart.