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  1. #1
    Registered User
    Join Date
    Mar 2003

    Extending com.nokia.microedition classes

    Does anyone know if the Nokia J2ME implementations guard against applications extending the Nokia classes?

    I was testing something and wrote a MIDlet containing a class that extended a Nokia implementation class - one of the classes that are in one of the com.nokia.microedition.xxxxx packages. This compiled fine but I found that when I ran it in the Series 60 emulator, the emulator exited when loading the class with no warning or error message. I then attempted to test it on my 7610 handset and found that I could not even install it - I keep getting the error "Authorisation failed!" during the install process. As soon as I remove the extending class from the JAR file, the MIDlet will install and run.

    Can anyone explain this behaviour?


  2. #2
    Regular Contributor
    Join Date
    Mar 2003

    During installation the midlet is checked for those things because this way you could easily break the security model.

    On Symbian phones (at leat 6600) there is a way to install those applications manualy.

    Look here:

    Hope this helps


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