In the Design view, the Properties tab enables you to define the appearance of your chart.

Currently, JasperReports Server takes advantage of only a small portion of the capabilities of the JFreeChart library. To customize a graph, you must write a class that implements the following interface:

net.sf.jasperreports.engine.JRChartCustomizer

The only method available from this interface is the following:

public void customize(JFreeChart chart, JRChart jasperChart);

It takes a JFreeChart object and a JRChart object as its arguments. The first object is used to actually produce the image, while the second contains all the features you specify during the design phase that are relevant to the customize method.