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Kotlin – Convert comma-separated String into List & List into one String

loizenai profile image loizenai ・1 min read

https://grokonez.com/kotlin/kotlin-convert-comma-separated-string-list-list-one-string

Kotlin – Convert comma-separated String into List & List into one String

This Kotlin tutorial gives you a simple example that helps to convert comma-separated String into List & List into one String.

I. Technology

  • Java 1.8
  • Kotlin 1.1.2

    II. Practice

    1. String into List

    Use CharSequence.split() method that returns a List, then map() each item with CharSequence.trim() method to remove [space] character.
    
    val input: String = "One, Two, Three, Four"

println("=== String into List ===")
var result: List = input.split(",").map { it.trim() }

result.forEach { println(it) }

Result:


=== String into List ===
One
Two
Three
Four

2. List into String

Use joinToString() method with prefix, postfix, limit 3 elements to be appended, and truncated by string "...more...":

More at:

https://grokonez.com/kotlin/kotlin-convert-comma-separated-string-list-list-one-string

Kotlin – Convert comma-separated String into List & List into one String

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