JAVA罗马数字转整数——力扣练习题

package com.shengda.Demo0Likou;

import java.util.HashMap;

public class Demo13 {
    public static void main(String[] args) {
        Solution solution = new Solution();
        String s = "IV";
        int num = solution.romanToInt(s);
        System.out.println(num);
    }
}

class Solution{
    public int romanToInt(String s) {
        // 将数值表存入到HashMap里边，然后进行对比
        

        // 通过swich进行获取每个字母对应的值
        int num = SetNum(s.charAt(s.length()-1));
        for (int i = 0; i < s.length()-1; i++) {
            int data1 = SetNum(s.charAt(i));
            int data2 = SetNum(s.charAt(i+1));
            if (data1