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Thread: java apps error

  1. #1
    Join Date
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    living in the u.s.
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    Default java apps error

    greetings,
    i am trying to open a java web apps with a browser. the apps starts normally, but quits at the final step, generating a error msg. stating the apps cannot be launched because of an unexpected exception:

    java.lang.NullPointerException

    Apollo:~ # update alternatives --config java
    If 'update' is not a typo you can use command-not-found to lookup the package that contains it, like this:
    cnf update
    Apollo:~ # alternatives --config java
    If 'alternatives' is not a typo you can use command-not-found to lookup the package that contains it, like this:
    cnf alternatives

    any suggestion would be greatly appreciated.
    thanks,
    theo
    gateway nv53 laptop -- amd athlon II x2 m300 processor -- ati radeon hd4200 graphics -- ar928x wireless network adapter / netlink bcm5784m gigabit ethernet pci
    openSUSE 13.2 Harlequin (x86_64) -- Linux 3.16.7-7-xen -- KDE 4.14.3

  2. #2

    Default Re: java apps error

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    Hash: SHA1

    The commands you're trying to run are failing because you're not
    specifying a valid comment. This may have nothing to do with your
    NullPointerException but it's what you showed so I'll focus on it instead:

    sudo /usr/sbin/update-alternatives --config java

    Once you know you have Java setup properly (you probably do... not sure
    what you're really trying to do with the update-alternatives command at
    this time) you may want to see if you can runt he Java application outside
    of a web browser startup. Is this an applet? Something using WebStart?

    Good luck.





    On 02/09/2011 08:06 AM, topitz wrote:
    >
    > greetings,
    > i am trying to open a java web apps with a browser. the apps starts
    > normally, but quits at the final step, generating a error msg. stating
    > the apps cannot be launched because of an unexpected exception:
    >
    > java.lang.NullPointerException
    >
    > Apollo:~ # update alternatives --config java
    > If 'update' is not a typo you can use command-not-found to lookup the
    > package that contains it, like this:
    > cnf update
    > Apollo:~ # alternatives --config java
    > If 'alternatives' is not a typo you can use command-not-found to lookup
    > the package that contains it, like this:
    > cnf alternatives
    >
    > any suggestion would be greatly appreciated.
    > thanks,
    > theo
    >
    >

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  3. #3
    Join Date
    Jul 2008
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    living in the u.s.
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    Default Re: java apps error

    sudo /usr/sbin/update-alternatives --config java
    generates:
    update-alternatives: internal error: /var/lib/rpm/alternatives/java corrupt: priority /usr/lib64/jvm/jre-1.5.0-gcj

    theo
    gateway nv53 laptop -- amd athlon II x2 m300 processor -- ati radeon hd4200 graphics -- ar928x wireless network adapter / netlink bcm5784m gigabit ethernet pci
    openSUSE 13.2 Harlequin (x86_64) -- Linux 3.16.7-7-xen -- KDE 4.14.3

  4. #4
    Join Date
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    San Diego, Ca, USA
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    Default Re: java apps error

    First,
    If I were to guess, you installed your Java from source, possibly from a Sun repository. I ran into this same issue in two old threads ab was so very helpful a few years ago on this same exact topic. Solution is to either install from the SuSE repositories or add the path to your java.

    How to point environ var to JDK?
    Problem: Sun JDK, not JRE

    Tony

    For reference, this is how your output should look, I have both a JRE and JDE installed

    Code:
    tony@SUSEBOX:~> sudo /usr/sbin/update-alternatives --config java
    root's password:
    
    There are 2 alternatives which provide `java'.
    
      Selection    Alternative
    -----------------------------------------------
    *+        1    /usr/lib/jvm/jre-1.6.0-openjdk/bin/java
              2    /usr/lib/jvm/jre-1.6.0-sun/bin/java
    
    Press enter to keep the default[*], or type selection number: ^C
    tony@SuSEBOX:~>

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