Java HashMap: How to get a key and value by index?

Question

I am trying to use a HashMap to map a unique string to a string ArrayList like this:

HashMap>

Basical

Answer 1

You can use Kotlin extension function

fun LinkedHashMap.getKeyByPosition(position: Int) =
        this.keys.toTypedArray()[position]


fun LinkedHashMap.getValueByPosition(position: Int) =
        this.values.toTypedArray()[position]