How to convert String to String array in Kotlin?

Question

I want to know how I can convert one string or a String Object in a String array using kotlin.

I made some research and found this JAVA code which seems to do what I need.

public static void main(String[] args) { 
String word="abc";
        String[] array = new String[word.length()];
        for(int i = 0; i < word.length(); i++)
        {
            array[i] = String.valueOf(word.charAt(i));
        }

        for(String a:array){
            System.out.println(a);
        }
}

I expect to have something like this or better than it in Kotlin.

Thanks in advance.

Well, it's complicated. Java sample is incorrect, thus, direct translations to Kotlin are incorrect, too. The problem is that char is not a character or code point but a UTF-16 word which can represent a half of a code point. See stackoverflow.com/questions/40878804/…, and use builtin IntelliJ J2K converter. — Miha_x64
– Miha_x64, Commented Sep 26, 2019 at 15:36

Artem Botnev · Accepted Answer · 2019-09-26 15:21:49Z

13

Something like this:

val str = "abcd"
val array: Array<String> = str.toCharArray().map { it.toString() }.toTypedArray()

answered Sep 26, 2019 at 15:21

Artem Botnev

2,4471 gold badge17 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

David Soroko Over a year ago

A bit simpler: str.map { it.toString() }.toTypedArray()

KKMurerwa Over a year ago

You can also simply allocate the result to a string list like this:val listStr: List<String> = str.map { it.toString() }

francis · Accepted Answer · 2021-03-09 23:45:53Z

8

Try This:

val str = "Hello"
val arr = str.split("")

fun main() {
    println(arr) // [, H, e, l, l, o]
}

edited Mar 9, 2021 at 23:45

answered Mar 9, 2021 at 22:45

francis

4,5652 gold badges33 silver badges36 bronze badges

2 Comments

raianmr Over a year ago

String.split("") returns a List<String>, but the question is about Array<String>.

francis Over a year ago

You can append .toTypedArray() to convert list to array

Tenfour04 · Accepted Answer · 2019-09-26 15:22:00Z

5

You can fill an array as you initialize it using a lambda that takes the index as an argument.

fun main() {
    val word = "abcd"
    val array = Array(word.length) {word[it].toString()}
    array.forEach { println(it) }
}

answered Sep 26, 2019 at 15:22

Tenfour04

95.1k14 gold badges125 silver badges181 bronze badges

Comments

Miha_x64 · Accepted Answer · 2019-09-26 15:55:47Z

1

You can use java.text.BreakIterator both from Java and Kotlin-JVM to iterate through 'grapheme clusters', i. e. user-visible 'characters'.

answered Sep 26, 2019 at 15:55

Miha_x64

6,3831 gold badge44 silver badges67 bronze badges

Comments

Rinat Suleimanov · Accepted Answer · 2020-04-16 23:44:20Z

1

fun main() {
    val string = "Hello"
    val array = Array(string.length) { string[it].toString() }
}

edited Apr 16, 2020 at 23:44

answered Sep 26, 2019 at 18:59

Rinat Suleimanov

5174 silver badges9 bronze badges

Collectives™ on Stack Overflow

How to convert String to String array in Kotlin?

5 Answers 5

2 Comments

2 Comments

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

2 Comments

2 Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related