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Applet or Application?

Posted on 2003-12-03
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Last Modified: 2013-11-23
I have written a Java app/applet - the program works whether it is started as an applet in IE/netscape/etc, or started by calling javaw.exe.

The problem I have is that I need to know if the program is running as an application, or as an applet inside IE(or other).

Is there anyway I can find this information?

Cheers.
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Question by:Cheney
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LVL 92

Expert Comment

by:objects
ID: 9871792
a few ways depending on how you've implemented it.
If you are using an Applet subclass in both then getAppletContext() will return null if not an applet.
If you aren't using an Applet subclass for your application then you should be able to derive it from that.
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Expert Comment

by:InNoCenT_Ch1ld
ID: 9871804
hmm, how come you dont know what you written?
your class extends JApplet to create an Applet...
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Author Comment

by:Cheney
ID: 9872112
What I've written is a program that although extends JApplet, works as a standalone app as well.  When running as a standalone the program needs to create a JFrame to run in, however when running as an applet, the frame is already there - hence the need for the prog. to know wheather it is running as an applet or an application.

Thanks objects, I'll test that then give you the points
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LVL 92

Expert Comment

by:objects
ID: 9872127
the other option is to generate your frame inside main() which is only called by app.
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LVL 2

Author Comment

by:Cheney
ID: 9872167
Ok, that didnt quite work.

I tried simply:

if(getAppletContext() == null)
{
    ... do JFrame creation stuff
}

however my program exited after a NullPointerException was thrown from inside Applet.getAppletContext().

So, i tried this:

try{getAppletContext();}
catch(NullPointerException e)
{
     ... do JFrame creation
}

which worked... except a NullPointerException is still thrown even if the program IS running as an applet (well, in AppletViewer anyway...).

Any ideas?
Cheers.
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Accepted Solution

by:
objects earned 50 total points
ID: 9872176
depends a bit on when u want to create your frame, your main could call the method to create the frame.
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Author Comment

by:Cheney
ID: 9872320
Ok, it works...

Thanks.
Rick.
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LVL 92

Expert Comment

by:objects
ID: 9872339
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