This Kotlin tutorial gives you a simple example that helps to convert comma-separated String into List & List into one String.
Related Post: Kotlin List & Mutable List tutorial with examples
>>> Refer to: JavaSampleApproach.com
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.
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val input: String = "One, Two, Three, Four" println("=== String into List ===") var result: List<String> = input.split(",").map { it.trim() } result.forEach { println(it) } |
Result:
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=== 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…”:
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val result = listOf("One", "Two", "Three", "Four") println(result) println("=== List into String ===") val output = result.joinToString("|", prefix = "<", postfix = ">", limit = 3, truncated = "...more...") println(output) |
Result:
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[One, Two, Three, Four] === List into String === <One|Two|Three|...more...> |