toString 
  Converts the contents of this byte array to a string using the specified charset.
Since Kotlin
1.0Samples
import java.util.Locale
import kotlin.test.*
fun main() { 
   //sampleStart 
   val charset = Charsets.UTF_8
val byteArray = "Hello".toByteArray(charset)
println(byteArray.contentToString()) // [72, 101, 108, 108, 111]
println(byteArray.toString(charset)) // Hello 
   //sampleEnd
}