Re: [libreoffice-users] Java Error while updating Language Tool

On 12/08/2013 04:22 AM, Gabriel Risterucci wrote:
> 2013/12/8 CVAlkan <foberle@enteract.com>
>
> > Hi:
> >
> > I'm using LibreOffice Writer Version: 4.1.3.2 Build ID:
> > 70feb7d99726f064edab4605a8ab840c50ec57a under 64 bit Ubuntu 12.04 LTS.
> >
> > I received a notification that an update was available for the Language
> > Tool, so I clicked and, for the first time ever, it actually downloaded
> > something, but the installation failed with the following message:
> >
> > ==================================
> [snip]​​
>
> > java.lang.UnsupportedClassVersionError: org/languagetool/openoffice/Main :
> > Unsupported major.minor version 51.0
> [snap]​​
>
> > The extension will not be installed.
> > ==========================
> >
> > In Options: LibreOffice: Advanced, I show two Java Runtime Environments
> > installed:
> > (selected): Sun Microsystems 1.6.0_27
> > (not selected): Oracle Corporation 1.7.0_25
> >
> > What do I do? I don't want to break anything else that uses Java and
> > everything else seems to work.
>
> ​Here's your problem. It seems like the languagetool extension is built
> against Java7 (which is the currently recommended version anyway), and your
> installation of Libreoffice use Java6.
> (for more informations, ​see
> http://en.wikipedia.org/wiki/Java_class_file#General_layout, which gives a
> helpful list of major version for java class files amongst other things).

And <http://extensions.libreoffice.org/extension-center/languagetool> 
states that version 2.3 of LanguageTool "requires Java 7 now."  So it is 
likely that the code actually makes use of features only available in 
Java 7, and was not only by accident compiled without a --target=6 switch.

Though, of course, the rather cryptic error message when trying to 
install it is not optimal...

Stephan

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