Is

javaClass

equal to

SomeClass::class.java

?

javaClass refers to SomeClass.Companion and not to SomeClass

Mmm what is SomeClass.Companion?

I have a springboot RestController, without companion object, and IntelliJ doesn't tell me anything if I try to use

javaClass

This is interesting. If you want to access .javaClass like this:

SomeClass.javaClass

, then it won't compile without a companion object. But if you want to do it directly from the class, then it compiles and

javaClass == SomeClass::class.java

is true

javaClass

has nothing to do with companion objects. It just needs an instance, it's an equivalent to Java's

.getClass()

.

But then

String.javaClass

would be the companion object's class if String had one.

ah, I didn't get that

That's a bit confusing honestly

If you're already in a class instance

javaclass

will always be the right one.

Perfect, thank you!

It's just that

MyClass.javaClass

can be the companion class, or it can be a compiler error.