LeetCode 171 JAVA

public class Solution {
    private static Scanner sc = null;
    private static final int RADIX = 26;

    enum Alphabet {
        A(1), B(2), C(3), D(4), E(5), F(6), G(7), H(8), I(9), J(10), K(11), L(12), M(13), N(14), O(15), P(16), Q(17),
        R(18), S(19), T(20), U(21), V(22), W(23), X(24), Y(25), Z(26);

        private int value;

        private Alphabet(int value) {
            this.value = value;
        }

        public int getValue() {
            return value;
        }

        public void setValue(int value) {
            this.value = value;
        }

        public int getValueByName(String c) {
            for (Alphabet alp : Alphabet.values()) {
                if (alp.name().equals(c)) {
                    return alp.value;
                }
            }
            return 0;
        }
    }

    public int titleToNumber(String str) {
        int result = 0;
        int alpLength = str.length() - 1;
        for (int i = 0; i <= alpLength; i++) {
            result = result + Alphabet.valueOf(String.valueOf(str.charAt(alpLength - i))).value
                * (int) Math.pow(RADIX, i);
        }
        return result;
    }
}