From the guide I know that `lateinit` vars cannot ...

# getting-started

[kastork]

From the guide I know that lateinit vars cannot be primitive types. If you're trying to create a bean-compliant class, how do you designate an Integer or Double type? If you make the property type Int you get the error that primitive types can't be lateinit, if you give it the type Integer you get the warning that you shouldn't use Integers but should use Int.. And for Double there doesn't even appear to be a way to say you want the Object Double and not a primitive double

[r4zzz4k]

IIRC Int? should always correspond to Integer, so you can use that. And you can create additional @Transient property with overriden get() and set() which would allow to avoid constant !!-ing. Not the best solution, but should work. Maybe someone could suggest better options though.

[kastork]

I was hoping to not have nullable fields

[kastork]

er, properties

[r4zzz4k]

Well, docs (https://kotlinlang.org/docs/reference/java-interop.html) specifically mention when boxed types are used, and the topic (https://discuss.kotlinlang.org/t/force-hint-of-int-to-java-lang-integer/2441) doesn't have anything useful either.
If you stick with wrapper property as I suggested you won't have to deal with nullable property in most of the code anyway.

[karelpeeters]

If you need to do this a lot maybe write a delegate for it?

[kastork]

I would think that making a class that can be used where a bean is expected by a java library would be a common thing.

[kastork]

In this case it turns out that using a Long and giving everything a default value satisfies the need for a default constructor (no lateinit needed)

[kastork]

thanks for the help guys

[r4zzz4k]

@karelpeeters, are you sure there is a way to use delegated property in a bean class? I'm not very good in specifics of desktop Java but I definitely remember there was some case in Android where delegated property couldn't be used, probably required actual backing field or something.

[karelpeeters]

Otherwise, you're right, that wouldn't work.