byteSuffix

import kotlin.test.*

fun main() { 
   //sampleStart 
   val data = ByteArray(4) { it.toByte() }

// By default, the byteSuffix is an empty string, so bytes are formatted without any suffix.
println(data.toHexString()) // 00010203
println("\"00010203\".hexToByteArray().contentEquals(data) is ${"00010203".hexToByteArray().contentEquals(data)}") // true

// Specifying a custom byte suffix, a semicolon in this case, to follow each byte.
val byteSuffixFormat = HexFormat {
    bytes.byteSuffix = ";"
}
println(data.toHexString(byteSuffixFormat)) // 00;01;02;03;
println("\"00;01;02;03;\".hexToByteArray(byteSuffixFormat).contentEquals(data) is ${"00;01;02;03;".hexToByteArray(byteSuffixFormat).contentEquals(data)}") // true

// Parsing fails due to incorrect byte suffix.
// In this case, the input string is lacking the necessary byte suffixes.
// "00010203".hexToByteArray(byteSuffixFormat) // will fail with IllegalArgumentException 
   //sampleEnd
}