How to access Kotlin companion objects from Java

Question

I have this Kotlin class:

class Storage {
    companion object {
        val COL_ID = "id"
    }
}

and I want to use the COL_ID in my Java code:

doSomething(Storage.COL_ID);

but, the compiler tells me that COL_ID is private. I have tried to add public to all the elements (class, object and val), but it has no effect.

How can I access these companion object constants?

Update I think my question is different from the given duplicate, because I want to create constants, instead of a static method.

You are missing const from your const val COL_ID (or @JvmField) — EpicPandaForce
– EpicPandaForce, Commented Mar 23, 2019 at 17:17
Possible duplicate of How to access Kotlin companion object in Java? — CryptoFool
– CryptoFool, Commented Mar 23, 2019 at 17:37
Hmmm...I wouldn't think that would work. Ok, well, I don't understand it then. So what was the solution you ultimately came up with? You said you already tried making it 'public' — CryptoFool
– CryptoFool, Commented Mar 23, 2019 at 17:41

Bart Friederichs · Accepted Answer · 2019-03-23 18:19:52Z

5

I added const, and everything was fine:

class Storage {
    companion object {
        const val COL_ID = "id"
    }
}

answered Mar 23, 2019 at 18:19

Bart Friederichs

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