posted 15 years ago
byte b = -42; // 1101 0110
int result = b >>> 4; // 268435453
It is instructive to compare the value of the expression (-42 >>> 4) with that of the expression (-42 >> 4), which has the value -3. The byte value for b, after unary numeric promotion to int, is shifted right with zero-fill four places.
b >>> 4
= 1111 1111 1111 1111 1111 1111 1101 0110 >>> 4
= 0000 1111 1111 1111 1111 1111 1111 1101
= 0x0ffffffd
= 268435453
But in the asked question since we are using an assigment operator the casting is done by the operator implicitly so
0111 1111 1111 1111 1111 1111 1111 1001 the higher order bits are dropped
and what results is 1111 1001 which is -7.