Interfaces and their implementation in java?

Question

Java

I have an API with a findRooms(int price) method and two implementations of BookingAPI and GoogleApi
and have a Controller class and an API[] apis array and a requestRoom(int price) method
here are my attempts:

public class Controller {
    API[] apis;
Room[] requestRooms(int price){
int count = 0;
        for (API api : apis) {
            if (api.findRooms(price, persons, city, hotel) != null) count++;
        }//считаю кол-во комнат
        Room[] res = new Room[count];// создаю массив для них
}

and then you need to go through the array of rooms (findRooms) and get these rooms,
I can’t think of it, explain where my snag is