Convert Array to List in Kotlin

Question

I try to do this with (same as java)

val disabledNos = intArrayOf(1, 2, 3, 4)
var integers = Arrays.asList(disabledNos)

but this doesn't give me a list. Any ideas?

The main problem why it didn't work in the first place, was, that you basically created a List<IntArray>. You need to use the spread operator (*) to get a List<Int>, i.e. the following would have worked too: val integers = Arrays.asList(*disabledNos). A similar question, that also mentions the actual error: Convert Array<String> to ArrayList<String> — Roland
– Roland, Commented Apr 1, 2019 at 9:29

crgarridos · Accepted Answer · 2017-10-10 09:12:52Z

104

Kotlin support in the standard library this conversion.

You can use directly

disableNos.toList()

or if you want to make it mutable:

disableNos.toMutableList()

answered Oct 10, 2017 at 9:12

crgarridos

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Comments

Alok Gupta · Accepted Answer · 2020-05-29 06:51:26Z

2

This will fix your problem :

val disabledNos = intArrayOf(1, 2, 3, 4)
var integers = Arrays.asList(*disabledNos)

Just add * to this to asList

edited May 29, 2020 at 6:51

answered Mar 26, 2020 at 5:43

Alok Gupta

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Comments

Jake Lee · Accepted Answer · 2018-06-29 09:03:54Z

0

Oops that was very simple:

var integers = disabledNos.toList()

edited Jun 29, 2018 at 9:03

Jake Lee

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answered Oct 10, 2017 at 9:05

Adolf Dsilva

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2 Comments

BakaWaii Over a year ago

This will give you List<IntArray> instead of List<Int>. @crgarridos's answer is correct.

Adolf Dsilva Over a year ago

Oh boy I forgot to remove Arrays.asList() while posting the answer :(

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