leetcode711

class Solution {
    public int numJewelsInStones(String j, String s) {
        short[] a = new short[256];
        for(short i=0;i<256;i++){
            a[i] = 0;
        }
        int length =  s.length();
        for(short i=0;i<length;i++){
            a[s.charAt(i)]++;
        }
        length = j.length();
        int sum = 0;
        for(short i=0;i<length;i++){
            sum = sum+a[j.charAt(i)];
        }
        return sum;
    }
}