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My Java project has an ItemType interface with the given values, which is implement by some classes. How can I implement this interface on Kotlin?

public interface ItemType { int TYPE_OPTION = 2; int TYPE_GRID = 3; int TYPE_CAROUSEL = 4; int TYPE_MUSIC = 5; int TYPE_GUESS = 6; int getItemType(); }
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    Wouldn't this be better as an enum? Commented Aug 1, 2019 at 20:44

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You can use the companion object:

interface ItemType { val itemType: Int companion object { const val TYPE_OPTION = 2 const val TYPE_GRID = 3 const val TYPE_CAROUSEL = 4 const val TYPE_MUSIC = 5 const val TYPE_GUESS = 6 } }
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It would be better if you put the reason why an issue occurs and how the solution works.

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