How method java.util.Collections#copy should look in kotlin?

Question

Many guids in which try to explain differences between ? extend T and ? super T use as example method java.util.Collections#copy

public static <T> void copy(List<? super T> dest, List<? extends T> src) {
}

How this method should look in kotlin? If i try to copy and past this method in Kotlin class and convert to kotlin by IntelliJ Idea when this method look like

fun <T> copy(dest: List<in T?>?, src: List<T?>?) {}

But this code not compiled.

Good to refer: https://stackoverflow.com/questions/46846025/how-to-clone-or-copy-a-list-in-kotlin/52907983 — Mebin Joe, Apr 06 '20 at 10:11

aiqency · Accepted Answer · 2020-04-06T12:40:44.573

0

Kotlin List are not mutable. See this post

fun <T> copy(
    dest: MutableList<in T>,
    src: List<T>
) {
}

edited Apr 06 '20 at 12:40

answered Apr 06 '20 at 10:43

aiqency

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How method java.util.Collections#copy should look in kotlin?

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