1. No browser yet supports Java 1.2.

• But you can add Swing to Java 1.1.
• When experimenting, the easiest way to test applets is to use the Java 1.2 appletviewer.
• The Java Plugin is an option also, mostly only useful for intranets.
• Next release of Netscape 5 promises Java 1.2 support.

2. Most usage is the same as with Applet

• JApplet inherits from Applet
• init, start, stop, etc. unchanged

3. Main differences in use

• Components go in the "content pane", not directly in the frame. Changing other properties (layout manager, background color, etc.) also apply to the content pane. Access content pane via getContentPane, or if you want to replace it with your container (e.g. a JPanel), use setContentPane.
• Default layout manager is BorderLayout (like Frame and JFrame), not FlowLayout (like Applet). This is really the layout manager of the content pane.
• You get Java (Metal) look by default, so you have to explicitly switch if you want native look.
• Do drawing in paintComponent, not paint.
• Double buffering turned on by default.

4. JApplet Example: Source Code

JAppletExample.java (Download source code)

import java.awt.*;
import javax.swing.*;

public class JAppletExample extends JApplet {
  public void init() {
    WindowUtilities.setNativeLookAndFeel();
    Container content = getContentPane();
    content.setBackground(Color.white);
    content.setLayout(new FlowLayout()); 
    content.add(new JButton("Button 1"));
    content.add(new JButton("Button 2"));
    content.add(new JButton("Button 3"));
  }
}

4. JApplet Example: Result