<What is the name of the Long class in Kotlin JNI?...

# stackoverflow

[user]

What is the name of the Long class in Kotlin JNI?
This Kotlin function
@JvmStatic external fun registerNativeWindowFromSurface(): Integer;

is found by with return type java/lang/Integer but when I add a Long:
@JvmStatic external fun registerNativeWindowFromSurface(id: Long): Integer;

I cannot find it with java/lang/Long in the argument.
Is Kotlin's Long a java long or a java/lang/Long? How can I get a Long class?