I have the following kotlin code ```class Wrapper(...

# announcements

[andylamax]

I have the following kotlin code

class Wrapper(val value: ULong)

When I try instantiating it from Java I get

Wrapper w = new Wrapper(5000L);

It says that the constructor is private. How do I instantiate such a class?

[diesieben07]

Make a constructor that accepts a normal Long for Java. Java does not support unsigned types or inline classes in general, as such you have to provide an alternative for Java.

[andylamax]

Thanks, though seems like a bit of a work around.

I thought the compiler would inline the value

[diesieben07]

It does, but inline classes can have constructors (init could do validation). So if you could just pass the plain value from Java that code would be bypassed.

[andylamax]

Thanks for the insight

[ephemient]

https://kotlinlang.org/docs/inline-classes.html#calling-from-java-code

[ephemient]

oh constructor, can't JvmName that. yeah, you'll have to expose another one for Java interop of you need it.

[diesieben07]

And you should only do that for inline classes that do not have constructors / init blocks.

[ephemient]

ULong doesn't, and you can take that into account when you write

[diesieben07]

Yes, just mentioning it as something to keep in mind.