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Message-ID: <49bf44f10811190724l48d621a2g8d6a46904741867c@mail.gmail.com>
Date: Wed, 19 Nov 2008 07:24:43 -0800
From: Grant <emailgrant@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Java "bad version number" - what to up/downgrade?
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>> >> I'm getting the following from dumphd:
>> >>
>> >> "bad version number in .class file"
>> >>
>> >> I gather that I may have the wrong version of something Java installed
>> >> but I don't know how that works. Can anyone tell me what package I
>> >> should try upgrading or downgrading?
>> >
>> > This normally means the class file is from a new version of Java then
>> > the
>> > virtual machine trying to run it (i.e. class files compiled under Java
>> > 1.5, but your trying to run it in Java 1.4).
>> >
>> > "java-config -L" (without quotes) will show you what virtual machines
>> > you
>> > have installed. On my machine it shows (the asterisk is the currently
>> > selected one, i.e. what will be used to run java applications):
>> >
>> > podge@venus ~ $ java-config -L
>> > The following VMs are available for generation-2:
>> > 1) Blackdown JDK 1.4.2.03 [blackdown-jdk-1.4.2]
>> > 2) Sun JDK 1.5.0.16 [sun-jdk-1.5]
>> > *) Sun JDK 1.6.0.07 [sun-jdk-1.6]
>> > podge@venus ~ $
>> >
>> > If the newest VM isn't selected as the default, read the man page for
>> > java-config and tell it to set the newest one as default (1.6 is the
>> > newest version).
>> >
>> > Shawn
>>
>> Thank you very much. Since I'm not a Java developer, do I want jre as
>> opposed to jdk?
>>
>> - Grabt
>
> Yeah, the JRE will be fine. The important thing is just which version is
> active. I do Java development, hence the JDK.
>
> Shawn
Can you tell me the best way to Gentoo all of this? I've now got:
# java-config -L
The following VMs are available for generation-2:
1) Sun 32bit JRE 1.6.0.07 [emul-linux-x86-java-1.6]
2) Sun JDK 1.5.0.16 [sun-jdk-1.5]
*) Sun JDK 1.6.0.07 [sun-jdk-1.6]
and dev-java/sun-jdk in my world file, and it wasn't there before.
Also, emerge world wants to install virtual/jre-1.6.0 and
virtual/jdk-1.6.0. Should I un-emerge sun-jdk-1.5?
- Grant