question: public static String toString ( final byte byteValue ) { final int tmp = byteValue << 8 ; char [ ] retstr = new char [ ] { HEX [ ( tmp > > 12 ) & 0x0F ] , HEX [ ( tmp > > 8 ) & 0x0F ] } ; return String . valueOf ( retstr ) ; }
target:  Turns a byte into a hexadecimal string.