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kotlinlang

<@U4KK5S5NV> I believe the difference is whether a Java `Class` or a Kotlin `KClass` is expected. `::class.java` will return `Class`.

Hi Sven. I think you are spot on. But the @RunWith JUnit annotation does indeed expect a Class. When I look in IntelliJ. But I guess that a KClass "is-a" Class when observed from Java... and perhaps that's enough for the JUnit runner framework to work

This is a special case for annotations. A `KClass` does not in general share an is-a relationship with `Class`
See quote:

"If you need to specify a class as an argument of an annotation, use a Kotlin class (KClass). The Kotlin compiler will automatically convert it to a Java class, so that the Java code will be able to see the annotations and arguments normally."
<https://kotlinlang.org/docs/reference/annotations.html#constructors>

Awesome, Ole - thanks for the explanation