How can I convert CharArray / Array<Char> to a String?

Question

I have a CharArray whose contents are characters like:

val chars = arrayOf('A', 'B', 'C')

or

val chars = "ABC".toCharArray()

I want to get the string "ABC" from this. How can I do it?

chars.toString() does not work; it works as if chars was a normal integer array.

holi-java · Accepted Answer · 2017-06-27 06:08:35Z

62

you can simply using Array#joinToString:

val result: String = chars.joinToString("");

OR convert chars to CharArray:

val result: String = String(chars.toCharArray());

OR declaring a primitive CharArray by using charArrayOf:

val chars = charArrayOf('A', 'B', 'C');
val result: String = String(chars);

answered Jun 27, 2017 at 5:49

holi-java

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1 Comment

toCharArray Won't work if String contains emojis. "AB😟🤹👨🏻✅👨👨🏿".toCharArray() will print: [A, B, ?, ?, ?, ?, ?, ?, ?, ?, ✅, ?, ?, ?, ?, ?, ?]

Big Pumpkin · Accepted Answer · 2020-12-30 17:30:38Z

4

You can also use concatToString.

val chars = "ABC".toCharArray()
val result = chars.concatToString()

answered Dec 30, 2020 at 17:30

Big Pumpkin

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Андрей Щеглов · Accepted Answer · 2019-06-20 14:36:39Z

2

Additionally, the String(chars: CharArray) constructor can be invoked as either

    val ctor: (CharArray) -> String = ::String
    val result = chars.let(ctor)

or

    val result = chars.let { String(it) }

answered Jun 20, 2019 at 14:36

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