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By on Friday, May 7, 2021

Kotlin Program to Convert List (ArrayList) to Array and Vice-Versa

In this program, you’ll learn to convert a list to an array using toArray() and array to list using asList() in Kotlin.

Example 1: Convert array list to array


fun main(args: Array<String>) {

    // an arraylist of vowels
    val vowels_list: List<String> = listOf("a", "e", "i", "o", "u")
    
    // converting arraylist to array
    val vowels_array: Array<String> = vowels_list.toTypedArray()
    
    // printing elements of the array 
    vowels_array.forEach { System.out.print(it) }
}

Output

aeiou

In the above program, we have defined an array list, vowels_list. To convert the array list to an array, we have used the toTypedArray() method.

Finally, the elements of the array are printed by using theforEach() loop.

Example 2: Convert array to array list


fun main(args: Array<String>) {

    // vowels array
    val vowels_array: Array<String> = arrayOf("a", "e", "i", "o", "u")
    
    // converting array to array list
    val vowels_list: List<String> = vowels_array.toList()
    
    // printing elements of the array list
    vowels_list.forEach { System.out.print(it) }
}

Output

aeiou

To convert an array to an array list, we have used the toList() method.

 

 

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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.
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