convert a byte array to string
You can always convert the byte array to a string if you know its charset,
val str = new String(bytes, StandardCharsets.UTF_8)And the default Charset would used if you don't specify any.
You could convert the byte array to a char array, and then construct a string from that
scala> val bytes = Array[Byte]('a','b','c','d')bytes: Array[Byte] = Array(97, 98, 99, 100)scala> (bytes.map(_.toChar)).mkString res10: String = abcdscala>
The bytes to string function I was looking for was where each byte was just a numeric value represented as a string, without any implied encoding. Thanks to the suggestions supplied here, I ended up with the following function which works for my purposes. I post it here incase it useful to someone else.
def showBytes(bytes: Array[Byte]):String = { bytes.map(b => "" + b.toInt).mkString(" ") }This function will return a string containing numeric values separated by spaces.