Jean and java JRE

[Contact - Cogsonomy <co...@cogsonomy.fr>]

Hi all,

I'm working with Eclipse and Maven. I am using Jena (version 4.5) and my 
version of the jre is 1.8.0_341. The version of my jdk is 1.8.0_831.

But, when i want to build my java program, I have this message :

"Exception in thread "main" java.lang.UnsupportedClassVersionError: 
org/apache/jena/tdb2/TDB2Factory has been compiled by a more recent 
version of the Java Runtime (class file version 55.0), this version of 
the Java Runtime only recognizes class file versions up to 52.0"

Apparently, this means that my JRE is 1.8 and the JRE used to compile 
TDB2F is 1.11. I can not update my JRE (it is not allow by Oracle).

So, how to do ? What is the solution ?

Many thanks in advance,

Best regards

            Xavier

Re: Jean and java JRE

[Steve Vestal <st...@adventiumlabs.com>]

If you install a recent version of Eclipse using Oomph (the default way 
now), it should give you an option to select a version of OpenJDK.  I 
think it puts it in the .p2 repository.  You may have to adjust some 
preferences and properties (I am not a Maven maven), but you can bypass 
the Oracle install of their JDK to get the Java version you want.

On 7/27/2022 6:53 AM, Contact - Cogsonomy wrote:
> Hi all,
>
> I'm working with Eclipse and Maven. I am using Jena (version 4.5) and 
> my version of the jre is 1.8.0_341. The version of my jdk is 1.8.0_831.
>
> But, when i want to build my java program, I have this message :
>
> "Exception in thread "main" java.lang.UnsupportedClassVersionError: 
> org/apache/jena/tdb2/TDB2Factory has been compiled by a more recent 
> version of the Java Runtime (class file version 55.0), this version of 
> the Java Runtime only recognizes class file versions up to 52.0"
>
> Apparently, this means that my JRE is 1.8 and the JRE used to compile 
> TDB2F is 1.11. I can not update my JRE (it is not allow by Oracle).
>
> So, how to do ? What is the solution ?
>
> Many thanks in advance,
>
> Best regards
>
>            Xavier
>