How to calculate x to the power y if x&y are input?

Question

how to code this in java

Answer 1

https://stackoverflow.com/questions/22084373/does-java-have-an-exponential-operator

Answer 2

int x; // from user
int y; // from user
while(y!=1){
x*=x;
y--;
}
system.out.println(x);

Answer 3

import java.lang.Math;

Math.pow(x, y);