How to launch my java application in a web browser?

Question

Hi. I try to launch my java application, e.g. "HellowWorld.java", using web browser.
1. How can I change my java application program to java applet in general way?
I read "Java: An Introduction to Computer Science and Programming, Third Edition"
by Walter Savitch and found page 803 - "Converting a Swing application to an applet".
My question is how I can know which class should be removed or not such as using JApplet instead of JFrame. Are there general rules about this?
2. I found "AWT only" tutorial had some example lauching application using "AppletButton".
How can I use this method to launch "HelloWorld.class"?
http://java.sun.com/docs/books/tutorial/information/download.html#OLDui
(after extracting zip file) -> ../OLDui/layout/card.html
3. (continued 2) Can I use above method to embed applet into web browser?
For example, java Swing application -> applet using "AppletButton" -> web browser using "<applet></applet>" tag.
I'd appreciate any partial anwers of these questions or other suggestions.
Thanks.

Answer 1

Thanks! Here is what I got from your help.
* HelloWorldSwing.java is a 1.4 example that
* requires no other files.
import javax.swing.*;  
import java.awt.*;                //for Container class    
//  public class HelloWorldSwing {
   public class HelloWorldSwingToApplet extends JApplet {
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
//    private static void createAndShowGUI() {
      private void createAndShowGUI() {
        //Make sure we have nice window decorations.
//        JFrame.setDefaultLookAndFeelDecorated(true);
        //Create and set up the window.
//        JFrame frame = new JFrame("HelloWorldSwing");
//        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     Container frameApplet = getContentPane();
        //Add the ubiquitous "Hello World" label.
        JLabel label = new JLabel("Hello World");
//        frame.getContentPane().add(label);
     frameApplet.add(label);
        //Display the window.
//        frame.pack();
//        frame.setVisible(true);
      public void init() {
       createAndShowGUI();
/*    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
}