public static int sum(final List<String> l) {
    return  int sum = Stream().map(n -> Integer.valueOf(n)).sum();
}


{"2","3","5"} => 10
  
  
  private static final List<String> SKIP_WORDS = Arrays.asList("AND", "OR", "BY", "OF");
  public static String acronym(final String input) {
     return  String string = Stream()
       .filter(input.split(" ").toArray() -> (!input.split(" ").toArray().contains("AND")) && ("OR")... )
        .map(input.split(" ").toArray() -> input.split(" ").toArray().charAt(0));
                                                
       
    }

INPUT                                                                                   OUTPUT
United States of America                                      USA
National Aeronautics and Space Administration                  NASA
light AMplification by stimuLAtion of Emitted Radiation       LASER


public static List<int>  findIndex(List<int> num, int target){
return List<int> list = new Stream("0,1,2,3").map(x,y -> (num.get(x) + num.get(y) == target));

}

[2,7,6,1],7 => [2,3]


/user/welcome?fname=abc&lname=xyz

@RestController
@RequestMapping("/user/welcome") 
public class RestController() {
  
  @GettingMapping("/fname", produces"application/json")
  public String fname(String fname) {
    return fname;
  }
  
  //same for lname
}


{
  "address": {
     "building": "1007",
     "coord": [ -73.856077, 40.848447 ],
     "street": "Morris Park Ave",
     "zipcode": "10462"
  },
  "borough": "Bronx",
  "cuisine": "Bakery",
  "grades": [
     { "date": { "$date": 1393804800000 }, "grade": "A", "score": 2 },
     { "date": { "$date": 1378857600000 }, "grade": "A", "score": 6 },
     { "date": { "$date": 1358985600000 }, "grade": "A", "score": 10 },
     { "date": { "$date": 1322006400000 }, "grade": "A", "score": 9 },
     { "date": { "$date": 1299715200000 }, "grade": "B", "score": 14 }
  ],
  "name": "Morris Park Bake Shop",
  "restaurant_id": "30075445"
}

db.inventory.find({address:{zipcode: 10462}})