Converting an Java Application to an Applet

Question

I am trying to convert a java application into an applet. I had a JFrame which had a 5 JPanels on it so to convert it I made the JFrame into a JPanel (mainPanel) and made the class extend JApplet.

However, I cannot update any of the panels when the mainPanel is on the applet however with exactly the same code - when the mainPanel is on a JFrame it works and the panels update.

Can anyone help?

You have to choose (override) init() method to add the components. — KV Prajapati, Dec 15 '11 at 12:31
A far better strategy is to launch the frame from a link using [Java Web Start](http://stackoverflow.com/tags/java-web-start/info). — Andrew Thompson, Dec 15 '11 at 15:30

score 1 · Accepted Answer · answered Dec 15 '11 at 12:35

1

Josh, converting a JFrame to JApplet is very easy.

Say you have a JFrame like this:

public class MyApp extends JFrame {
  .
  .
  public void initComponents() {
    // components initialisation here
  }
}

This class can easily become a JApplet:

public class MyApp extends JApplet {
  .
  .
  public void init() {
    // components initialisation here
  }
}

Note the difference - initComponents() became init() because Applets need the init() method.

answered Dec 15 '11 at 12:35

DejanLekic

18,787
4
46
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*"X to JApplet is very easy."* Anything involving 'to JApplet' is rarely, if ever, 'easy'. Further, applets are inherently more tricky to deploy and update. As one (of many) examples, see [Copy & Paste Not working in a *Signed* Applet](http://stackoverflow.com/questions/8513740/copy-paste-not-working-in-a-signed-applet). – Andrew Thompson Dec 15 '11 at 15:28

score 0 · Answer 2 · answered Jul 15 '13 at 06:14

0

You can convert Java Application into Java by initializing Applet in beginning and defining components in init();

answered Jul 15 '13 at 06:14

Ravi Shankar Pandey

1

Converting an Java Application to an Applet

2 Answers2