LeetCode387. 字符串中的第一个唯一字符

 1 class Solution {
 2     public int firstUniqChar(String s) {
 3 
 4         int[] freq = new int[26];
 5         for(int i = 0; i < s.length(); i ++){
 6             freq[s.charAt(i) - 'a'] ++;
 7         }
 8         for(int i = 0; i < s.length(); i ++){
 9             if(freq[s.charAt(i) - 'a'] == 1){
10                 return i;
11             }
12         }
13         return -1;
14 
15     }
16 }
Solution bobo
原文地址:https://www.cnblogs.com/HuangYJ/p/12884967.html