How can I have My applet work with the browser ??

Question

I created an applet but it giving an error when I try to put in a web browser
package applet;
//This Java Program determines the amount on maturity.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import static java.lang.Math.*;
import java.applet.Applet;
public class VanExo extends Applet
     private static final long serialVersionUID = 1L;
     private JLabel amtL, yearL, interestL, valueL;
    private JTextField amtTF, yearTF, interestTF, valueTF;
    private JButton calculateB, exitB;
    private CalculateButtonHandler cbHandler;
    private ExitButtonHandler ebHandler;
    private static final int WIDTH = 400;
    private static final int HEIGHT = 300;
    public void init()
          setLayout(new GridLayout(5, 2));
            //create four labels
        amtL = new JLabel("Amount deposited : ",
                         SwingConstants.RIGHT);
        yearL = new JLabel("Duration in years : ",
                  SwingConstants.RIGHT);
        interestL = new JLabel("Interest rate : ",
                    SwingConstants.RIGHT);
        valueL = new JLabel("Value on maturity : ",
                    SwingConstants.RIGHT);
            //create four textfields
        amtTF = new JTextField(10);
        yearTF = new JTextField(10);
        interestTF = new JTextField(10);
        valueTF = new JTextField(10);
            //create Calculate Button
        calculateB = new JButton("Calculate");
        cbHandler = new CalculateButtonHandler();
        calculateB.addActionListener(cbHandler);
            //create Exit Button
        exitB = new JButton("Exit");
        ebHandler = new ExitButtonHandler();
        exitB.addActionListener(ebHandler);
        add(amtL);
        add(amtTF);
        add(yearL);
        add(yearTF);
        add(interestL);
        add(interestTF);
        add(valueL);
        add(valueTF);
        add(calculateB);
        add(exitB);
            //set the size of the window and display it
        setSize(WIDTH,HEIGHT);
        setVisible(true);
        //setDefaultCloseOperation(EXIT_ON_CLOSE);
    public void start(){
        System.out.println("Applet starting.");
     public void stop(){
        System.out.println("Applet stopping.");
     public void destroy(){
        System.out.println("Destroy method called.");
    private class CalculateButtonHandler implements ActionListener
        public void actionPerformed(ActionEvent e)
            double year, amt, interest, value;
            amt = Double.parseDouble(amtTF.getText());
            year = Double.parseDouble(yearTF.getText());
            interest = Double.parseDouble(interestTF.getText());
            value = amt * pow((1.0 + (interest/100.0)), year);
            valueTF.setText("" + String.format("%.2f", value));
   private class ExitButtonHandler implements ActionListener
        public void actionPerformed(ActionEvent e)
            System.exit(0);
}

Answer 1

here the error
Java Plug-in 1.6.0_05
Utilisation de la version JRE 1.6.0_05 Java HotSpot(TM) Client VM
R�pertoire d'accueil de l'utilisateur = C:\Documents and Settings\ndiayea
c:   effacer la fen�tre de la console
f:   finaliser les objets de la file d'attente de finalisation
g:   lib�rer la m�moire
h:   afficher ce message d'aide
l:   vider la liste des chargeurs de classes
m:   imprimer le relev� d'utilisation de la m�moire
o:   d�clencher la consignation
p:   recharger la configuration du proxy
q:   masquer la console
r:   recharger la configuration des politiques
s:   vider les propri�t�s syst�me et d�ploiement
t:   vider la liste des threads
v:   vider la pile des threads
x:   effacer le cache de chargeurs de classes
0-5: fixer le niveau de tra�age � <n>
java.lang.NoClassDefFoundError: VanExo (wrong name: applet/VanExo)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: VanExo (wrong name: applet/VanExo)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: VanExo (wrong name: applet/VanExo)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: VanExo (wrong name: applet/VanExo)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: VanExo (wrong name: applet/VanExo)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)