understanding piechart in jfreechart

Question

public static JFreeChart createPieChart(java.lang.String title,
                        PieDataset dataset,
                        boolean legend,
                        boolean tooltips,
                        boolean urls)

I want to know about using the last parameter urls;

what does it means?

any example of it?

Configure chart to generate URLs? what does it mean?

Answer 1

By googling i found this code of the ChartFactory http://www.jfree.org/jfreechart/api/gjdoc/org/jfree/chart/ChartFactory-source.html

Looking in the test of using urls there a instance of a new StandardPieURLGenerator

The jsfreechart help tells:

Interface for a URL generator for plots that use data from a PieDataset. Classes that implement this interface:
 - are responsible for correctly escaping any text that is derived from the dataset, as this may be user-specified and could pose a security risk;
 - should be either (a) immutable, or (b) cloneable via the PublicCloneable interface (defined in the JCommon class library). This provides a mechanism for the referring plot to clone the generator if necessary.

http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/urls/PieURLGenerator.html

I hope this can help.