Java

lizncu

class Solution {
  public int numJewelsInStones(String J, String S) {
    int count = 0;

    for (int i = 0; i < J.length(); i++) {
      for (int j = 0; j < S.length(); j++) {
        if (S.charAt(j) == J.charAt(i)) {
          count++;
        }
      }
    }

    return count;
  }
}