compute a power b in java code example

Example 1: how to find powers in java

int n=Math.pow(N, P);

Example 2: Write a method that raises a number to a power without using Math.pow() method

public class Power {

    public static void main(String[] args) {

        int base = 3, exponent = 4;

        long result = 1;

        while (exponent != 0)
        {
            result *= base;
            --exponent;
        }

        System.out.println("Answer = " + result);
    }
}