Java implicit conversion of int to byte

Question

I am about to start working on something the requires reading bytes and creating strings. The bytes being read represent UTF-16 strings. So just to test things out I wante

Answer 1

Because int are signed and 0xffffffff represent -1, and 0xff represent an integer of value 255, which not lie into -128 (0x80) +127 (0x7f) range of a byte.