comefrom: <qiyuangong>771_Jewels_and_Stones_1.java
code: public int numJewelsInStones(String J, String S) {
          int result = 0;
          HashSet jHash = new HashSet<>();
          for (int j = 0; j < J.length(); j++) {
              jHash.add(J.charAt(j));
          }
          for (int s = 0; s < S.length(); s++) {
              if (jHash.contains(S.charAt(s))) {
                  result++;
              }
          }
          return result;
      }
masked: public int sample_funcname ( String var_0 , String var_1 ) {
    int var_2 = 0 ;
    HashSet var_3 = new HashSet < > ( ) ;
    for ( int var_4 = 0 ;
    var_4 < var_0 . length ( ) ;
    var_4 ++ ) {
      var_3 . add ( var_0 . charAt ( var_4 ) ) ;
    }
    for ( int var_5 = 0 ;
    var_5 < var_1 . length ( ) ;
    var_5 ++ ) {
      if ( var_3 . contains ( var_1 . charAt ( var_5 ) ) ) {
        var_2 ++ ;
      }
    }
    return var_2 ;
  }
  