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Aside from "one is an enum, and one is an interface" I mean :wink:

`JavaVersion` is much older and has nothing to do with toolchains

You can for example use `JavaVersion.current()` to do something depending on the Java version with which Gradle is executed

`JavaLanguageVersion` is for the toolchain support to define a Java language version to use for something

Of course you can do something like `_languageVersion_.set(JavaLanguageVersion.of(JavaVersion._VERSION_17_._majorVersion_))` to combine both

But I personally do store the Java version to be used together with the other versions in the version catalog now

`_languageVersion_.set(JavaLanguageVersion.of(_libs_._versions_._java_.get()))`

I just meant conceptually, sorry.  So they are conceptually the same; just different that `JavaLanguageVersion`is specifically intended for toolchains

Conceptually they are both about a Java version, yes

That's interesting about version catalog, had not considered that :slightly_smiling_face: