Literal Syntax For byte[] arrays using Hex notation..?

Question

The compiler seems to be ok with this (single digit hex values only):

byte[] rawbytes={0xa, 0x2, 0xf};

But not this:

byte[]         


        

Answer 1

byte is signed and 0xff = 255 is too big. The valid range is (-128 .. 127).

Example code:

public static void main(String[] args) {
    byte b = (byte) 0xff;    // = -1
    int i = b;               // = -1
    int j = b & 0xff;        // = 255

    System.out.printf("b=%s, i=%s, j=%s", b,i,j);
}