Adding label to stacked bar created using jfree

[prasath.t]

from org.jfree.chart.renderer.category import StandardBarPainter           
	
	

	plot = chart.getPlot()
	renderer = plot.getRenderer()
	renderer.setBarPainter(StandardBarPainter())                                                        
	renderer.setShadowVisible(0)         
	renderer.setMaximumBarWidth(0.3)

above mentioned script i have written in configurechart
how to add label to my stacked bar
please let me know the script for showing label