Adding a Barchart to an Applet using JFreeChart

[Teja Venkat]

Hai everyone I had written code for showing a bar chart in an applet the code is given below:

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JApplet;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 *
 * @author INDIA
 */
public class BarChartApp extends JApplet {

    /**
     * Initialization method that will be called after the applet is loaded into
     * the browser.
     */
    public void init() {
        
    }
    public void paint (Graphics g)
    {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset(); 
        dataset.setValue(2, "Sheets", "1");
        dataset.setValue(7, "Sheets", "2");
        dataset.setValue(4, "Sheets", "3");
        dataset.setValue(9, "Sheets", "4");
        dataset.setValue(6, "Sheets", "5"); 
        JFreeChart chart = ChartFactory.createBarChart ("BarChart using JFreeChart","Student", "Marks", dataset, PlotOrientation.VERTICAL, true,true, false); 
        
        Rectangle2D r = new Rectangle2D.Double(150,350,200,200);
        if(chart!=null)
        {   
            chart.draw((Graphics2D)g, r);
        }
       
        }
}

I am getting blank screen on executing this code.. Please help me sort out this problem

[Richard Tookey]

You should not be overriding the paint() method for this. In the init() method you should be creating the JFreeChart, constructing a ChartPanel using the created JFreeChart and adding the ChartPanel as a component to the JApplet component tree - probably the JApplet content pane.