Ok, by writing chartCustomizer we can accomplish that by over implementing customize method like CategoryPlot plot = jfct.getCategoryPlot(); plot.getRenderer().setSeriesStroke(0, BasicStroke. new BasicStroke(1.0f, BasicStroke.CAP_ROUND, JOIN_ROUND, 1.0f, new float[] {5.0f, 5.0f}, 0.0f));Thanks, Anita Srivastava