How to declare a byte array in Scala?

I believe the shortest you can do is

val ipaddr = Array[Byte](192.toByte, 168.toByte, 1, 9)

You have to convert 192 and 168 to bytes because they are not valid byte literals as they are outside the range of signed bytes ([-128, 127]).

Note that the same goes for Java, the following gives a compile error:

byte[] ipaddr = {192, 168, 1, 1};

You have to cast 192 and 168 to bytes:

byte[] ipaddr = {(byte)192, (byte)168, 1, 1};