How to initialize an empty array list in Kotlin? [duplicate]

Question

I have an empty array list:

var mylist: ArrayList<Int> = ArrayList() 

When I want to set value in it I got this error:

java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 

The question is: How can I initialize my list?

Answer 1

According to the api-doc:

val list = arrayListOf<Int>() 

This is also mentioned here: How to initialize List in Kotlin? .

Answer 2

I suggest you write

var myList: ArrayList<Int> = arrayListOf()