本文共 506 字，大约阅读时间需要 1 分钟。

class Solution {
       public int numJewelsInStones(String jewels, String stones) {
           int ans = 0;        int jewelsLength = jewels.length();        int stonesLength = stones.length();        Set
   
     set = new HashSet<>();        for(int i = 0; i < jewelsLength; i++) {
               set.add(jewels.charAt(i));        }        for(int i = 0; i < stonesLength; i++) {
               if(set.contains(stones.charAt(i))) {
                   ans++;            }        }        return ans;    }}
   

转载地址：http://eohzi.baihongyu.com/