Wrapping An Applet Around An Application

Question

I have a working application, but I need to convert it to an applet. My main method isn't located in my frame class so I can't just extend JApplet and change my main method to init(). Is there an easy way to "wrap" an applet around an application.

Just initialize that (frame) class and make it visible in a new class which extends applet. — Sudhanshu Umalkar, Mar 21 '13 at 14:26
ok but if i make my main class extend japplet it creates and applet with nothing in it and then my usual frame... — Zyvo, Mar 21 '13 at 14:27
If you need an applet, you need a class that extends JApplet or Applet, no workaround here I guess. You can make the frame visible in its constructor. — Sudhanshu Umalkar, Mar 21 '13 at 14:36
Yes I know I need a class that extends it, but can I have a class that just adds panels to applets? — Zyvo, Mar 21 '13 at 14:37
You should be able to do that if you have access to an instance of the applet. — Sudhanshu Umalkar, Mar 21 '13 at 14:38
Several hybrid examples are cited [here](http://stackoverflow.com/a/12449949/230513); also consider [tag:javawebstart]. — trashgod, Mar 21 '13 at 16:23

score 1 · Answer 1 · answered Mar 21 '13 at 22:05

1

I would separate out the guts of your UI creation, then call it either from main() or init(). See the below example:

public class Test extends Applet {
    private JPanel mainPanel;

    // run as application
    public static void main(String[] args) {
        Test test = new Test();
        test.createUI();

        JFrame frame = new JFrame();
        frame.add(test.mainPanel);
        frame.pack();
        frame.setVisible(true);
    }


    // run as applet
    public void init() {
        createUI();
        add(mainPanel);
    }


    // create your UI here
    private void createUI() {
        mainPanel = new JPanel();
        mainPanel.add(new JButton("Test"));
    }
}

answered Mar 21 '13 at 22:05

martinez314

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So this somewhat worked, but now when I run the program it doesn't set the correct size, which really doesn't matter because when on a webpage it'll be the size I set in the HTML code. The only problem is that when I go to export it through eclipse, it can't find a main class. It finds a main class when I want to run it, but not when I try to export it. – Zyvo Mar 22 '13 at 13:09
@RiFFRaFF If you run it from Eclipse, it should automatically create a Run Configuration. You should find this Run Configuration when you try to Export it, which is what points it to the main class. Can't think of a reason why this wouldn't work. – martinez314 Mar 22 '13 at 17:57

Wrapping An Applet Around An Application

1 Answers1