Most elegant way to change 0 to 1 and vice versa

Question

What is the most elegant way to do the next stuff:

int i = oneOrZero;

if (i == 0) {
   i = 1;
} else {
   i = 0;
}

You can assume that

Answer 1

i = ( i + 1 ) % 2, though I think we all agree the subtraction or xor method is better! (Though it has the added benefit of "flipping the switch" for more than binary.)