18 code example

Example: 18

public class Apartment {    int numOfFloors;    public int getFloors(){        return numOfFloors;     }        public void setFloors(int number){        numOfFloors = number;    }        public addFloors(int count){       numOfFloors += count;    }        public void main(String[] args){        Apartment a1 = new Apartment();        a1.setFloors(20);        Apartment a2 = new Apartment();        a2.setFloors(18);        Apartment a3 = a2;        a3.addFloors(6);        System.out.println(a1.getFloors());      } }