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Java Development

New Developer
Posts: 7
Registered: ‎08-04-2008
My Device: Not Specified

Exception thrown in a midlet constructor



I have a BlackBerry 8800 with firmware (Platform Prosumer from Vodafone.
It wasn't bound with vodafone, therefore it is now running with an O2-simcard and the BlackBerry-Option from O2: Surfing, http, ftp, everything working fine.


I'm developing midlet-apllications with JDE 4.3.0.
First all midlets working fine, but now i get the following error on start every of my midlets:
Uncaught exception: Exception thrown in a midlet constructor


The error occure only on the device, not on the simulator.


Any suggestions?

The following things i already tried or wish to try but don't know how:


-erasing und reinstall with javaloader.exe has no effect.
-The hint from the engl. BB-forum: "erase all application data" in DesktopManager i couldn't try, because this possibility is not available anymore in the actual version

4.5 (i couldn't find it). There was also no information about the version which has this possibility.
-With the next hint: "firmware-Update" i also have a problem: strangely there is no firmware available for the 8800 at the BlackBerry-Homepage.
Can I use every a firmware from any vendor?
After ordering the BlackBerry-Option from O2 i get the browser on the device. Will I loose this after firmware-update?



BlackBerry Development Advisor
Posts: 15,417
Registered: ‎07-09-2008
My Device: BlackBerry Passport
My Carrier: Bell

Re: Exception thrown in a midlet constructor

Applications built in version 4.3.0 of the BlackBerry JDE are not compatible with BlackBerry handheld software version 4.2.1.  Please see the link below for more information.


What Is - Appropriate version of the BlackBerry JDE
Article Number: DB-00537


Mark Sohm
BlackBerry Development Advisor

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New Developer
Posts: 7
Registered: ‎08-04-2008
My Device: Not Specified

Re: Exception thrown in a midlet constructor

[ Edited ]

Thanks for information.

I tried JDE 4.2.1 and still get the error.


I updated firmware, this solve the problem!

Message Edited by cstarling on 08-13-2008 09:02 AM
Posts: 26
Registered: ‎07-23-2008
My Device: Not Specified

Re: Exception thrown in a midlet constructor

I've seen this exception thrown by a UiApplication. This happens because I was still passing "-midlet" as an argument to rapc. I'm posting this here because I'm sure a few people out there using ant and netbeans will run into it when migrating an existing MIDlet to a UiApplication.
New Member
Posts: 1
Registered: ‎06-25-2013
My Device: Curve 8520
My Carrier: MTN

Re: Exception thrown in a midlet constructor

i have to say if t wasnt this post which i cam accross after i have been stucked for  like 5 hours i would still be confused as hell infront of this computer. thank you for such post *clapping*