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  1. #1
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    Changing the JVM of mobile

    Can we change the JVM of mobile devices ourself?
    Java is platform independent language because of the JVM.
    JVM produced the machine language instruction that is understandable by the underlying processor and os.
    If a new os comes, we have to update the JVM.

    So can we change the JVM of mobile devices ourself?

  2. #2
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    Re: Changing the JVM of mobile

    HI,
    java language is platform in-dependent, the JVM used on phone depends on the OEM, what kind of JVM its using.
    Replacing JVM on a mobile hand for public developer, afaik is not provided for 3rd party developers.

    Regards,
    Mateen Maldar
    "Whatever the mind can conceive and believe, the mind can achieve"

  3. #3
    Nokia Developer Champion
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    Re: Changing the JVM of mobile

    Most of the Nokia phones come with a fixed Java ME environment (with a set of APIs) which is part of the firmware and cannot be changed/updated.
    For some S60 / Symbian phones you can download a newer version of Java (than what the device ships with), see here http://wiki.forum.nokia.com/index.ph...me_for_Symbian

    Hartti

  4. #4
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    Re: Changing the JVM of mobile

    Can I run the J2ME MIDlet on the Window CE device?
    The os of Window CE device is .net compact framework.
    I have ever test the MIDlet just on the Symbian os phones.
    J2ME should be able to run on the Window CE device because it is a platform independent language.
    Can it work?
    or will it work only there is a JVM?
    But if there is not JVM, it will not work because JVM cannot be loaded by 3rd developers?

  5. #5
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    Re: Changing the JVM of mobile

    HI,

    wince has support of jvm , you can install and work with midlet.

    Regards,
    Mateen Maldar
    "Whatever the mind can conceive and believe, the mind can achieve"

  6. #6
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    Re: Changing the JVM of mobile

    What is the meaning of Java enabled devices?
    Does that mean the device with JVM?
    How can we know that whether a device is a java enabled devices or not?

  7. #7
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    Re: Changing the JVM of mobile

    Hi,

    please go through this

    http://en.wikipedia.org/wiki/Java_Virtual_Machine

    check the device specification
    http://www.forum.nokia.com/Devices/D...cations/E7-00/

    Regards,
    Mateen Maldar
    "Whatever the mind can conceive and believe, the mind can achieve"

  8. #8
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    Re: Changing the JVM of mobile

    Quote Originally Posted by gracy View Post
    What is the meaning of Java enabled devices?
    Does that mean the device with JVM?
    Yes. It means the device has a JRE (Java Runtime Environment), of which the JVM is one component. The JRE also contains the runtime class library.

    Quote Originally Posted by gracy View Post
    How can we know that whether a device is a java enabled devices or not?
    Check the individual specifications of the device, from the manufacturers developer site, or somewhere like GSMArena or JBenchmark.

    Not that not all JREs are the same. You will need detailed specifications (usually from the manufacturer) to determine what JVM is available (a full JVM, or the more limited CLDC JVM), and what APIs are supported (such as CLDC, MIDP, etc.) in the JRE's class library.

    Graham.

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