Hi! When using Kotlin with Gradle, should I define

java.toolchain

or

kotlin.toolchain

in my

build.gradle.kts

or both? What is the difference between the two?

I use the following in my Kotlin JVM project for the Kotlin source code:

kotlin {
        jvmToolchain(<My Javaversion>)
    }

If the project also has Java code you can use a toolchain for that.

java{
    toolchain {
       anguageVersion.set(JavaLanguageVersion.of(<My Java version))
    }
}

Have you checked the Gradle documentation regarding toolchain? https://docs.gradle.org/current/userguide/toolchains.html

only one of them. It is up to you what to use exactly

@tapchicoma That was also my understanding. So in a pure Kotlin project, it doesn't actually matter?

yes, even in mixed Java/Kotlin it does not matter. DSL in Kotlin extension for now exists for convenience. In the future that may change for Kotlin-only projects.

Thanks for clarification.

Thanks for the quick answer!