java的Math.pow不支持3个参数吗？

 public Boolean rabin_miller(double num) {
        int s = num.subtract(BigInteger.ONE);
        int t = 0;
        BigInteger[] bis = s.divideAndRemainder(two);
        while(bis[1].compareTo(BigInteger.ZERO)== 0){
            s = (double) (s.divide(two));
            t += 1;
        }
        for (int i = 0; i < 5; i++) {
            int max = num.subtract(BigInteger.ONE);
            int min = 2;
            Random random = new Random();
            double a = (double) random.nextInt(max)%(max-min+1) + min;
            int v = (int) Math.pow(a, s, num);
            if(v != 1){
                i = 0;
                while(v != (num.subtract(one))) {
                    if(i == t - 1)
                        return false;
                    else{
                        i = i + 1;
                        v = (v ** 2) % num;
                    }
                }
            }
            return true;
        }
    }