GCD and LCM of Two Numbers in Java

public class GCD {
    public static void main(String[] args) {
        int n1 = 81, n2 = 153;
        
        while(n1 != n2) {
            if(n1 > n2)
                n1 -= n2;
            else
                n2 -= n1;
        }
        
        System.out.println("GCD: " + n1);
    }
}

public class LCM {
    public static void main(String[] args) {
        int n1 = 72, n2 = 120, gcd = 1;

        for(int i = 1; i <= n1 && i <= n2; ++i) {
            // Checks if i is factor of both integers
            if(n1 % i == 0 && n2 % i == 0)
                gcd = i;
        }

        int lcm = (n1 * n2) / gcd;
        System.out.printf("The LCM of %d and %d is %d.", n1, n2, lcm);
    }
}