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

int x = 0;
x=(int)Math.cos(x);
System.out.println("X value "+x);