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Here is my code:

interface Dwelling {
int getNumberOfOccupants();
}

public class House extends Building implements Dwelling  {
@Override
public int getNumberOfOccupants() {
    return occupants;
}
}

public class ApartmentBuilding extends HighRise implements Dwelling{
@Override
    public int getNumberOfOccupants() {
        totalOccupants = numberOfFloors * occupantsPerFloor;
        return totalOccupants;
    }
 }



public class Village extends Building{
public int getPopulation(){
        size = House.getNumberOfOccupants() + ApartmentBuilding.getNumberOfOccupants();
        return size;
    }
 }

When I try to add the getNumberOfOccupants() methods from the House and ApartmentBuilding classes I am getting a Non-static method 'getNumberOfOccupants()' cannot be referenced from a static context error. I am not sure how I can add these methods to produce the getPopulation() method

Delano Petrilli
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    Does this answer your question? [Non-static variable cannot be referenced from a static context](https://stackoverflow.com/questions/2559527/non-static-variable-cannot-be-referenced-from-a-static-context) – OH GOD SPIDERS Jul 29 '21 at 15:17
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    You can't, because those methods are not `static`. Nor should they be, as houses and other buildings vary in their key attributes, which are not particular to a class. Also your population method implementation (attempted) suggests you have a village with one house and one apartment - isn't that a bit strange? – g00se Jul 29 '21 at 15:18
  • ok sorry I am learning java and Im not sure how I would go about getting the total population for all buildings? – Delano Petrilli Jul 29 '21 at 15:20
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    `Village extends Building` does not make much sense. A Village isn't a more specific type of a Single Building. A Village is something that contains Buildings, but isn't a building itself. Your Village class should therefor not extend the building class, but be able to hold a List/Array of buildings that it is made of. – OH GOD SPIDERS Jul 29 '21 at 15:20
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    You need to think about your design more before writing code (the last thing). Think about it - what IS a village? – g00se Jul 29 '21 at 15:21

1 Answers1

1

you have created instance method getNumberOfOccupants() in the class House and same way in the class ApartmentBuilding. calling like these are static method, that's why you are getting error.

Ashish Chaurasia
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