JFreeChart barChart;
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.setValue(30, "x/y", "barchart_representation1");
dataset.setValue(20, "x/y", "barchart_representation2");
char = ChartFactory.createBarChart("Title: Just A Bar Chart Example",
    			"Value", "Denotion", dataset,
				PlotOrientation.VERTICAL, false, true, false);
 
JFreeChart pie_chart;
DefaultPieDataset dataset = new DefaultPieDataset();
    	dataset.setValue("potatoes", 60);
    	dataset.setValue("tomatoes", 10);
    	dataset.setValue("pears", 30);
pie_chart = ChartFactory.createPieChart(
    			"Quantity of Farm Products sold",
				dataset,
				true,
				true,
				false);
                                
BufferedImage image = chart.createBufferedImage(500,300);
BufferedImage image2 = pie_chart.createBufferedImage(500,300);
 
//  These JLabels may then be placed in a JPanel and voila!!
//  You have your Bar Graph and Pie Chart
JLabel label1 = new JLabel();
JLabel label2 = new JLabel();
label1.setIcon(image);
label2.setIcon(image2);