how do i do it ?
package com.codegym.task.task14.task1415;
import java.util.ArrayList;
import java.util.List;
/*
Janitorial services
*/
public class Solution {
public static void main(String[] args) {
List<Apartment> apartments = new ArrayList<>();
apartments.add(new OneRoomApt());
apartments.add(new TwoRoomApt());
apartments.add(new ThreeRoomApt());
cleanAllApartments(apartments);
}
public static void cleanAllApartments(List<Apartment> apartments) {
// Write your implementation of Items 1-4 here
for(Apartment ap : apartments){
if (ap instanceof OneRoomApt){
((OneRoomApt) apartments).clean1Room();
}
else
if (ap instanceof TwoRoomApt){
((TwoRoomApt) apartments).clean2Rooms();
}
else
if (ap instanceof ThreeRoomApt){
((ThreeRoomApt) apartments).clean3Rooms();
}
}
}
static interface Apartment {
}
static class OneRoomApt implements Apartment {
void clean1Room() {
System.out.println("1 room has been cleaned");
}
}
static class TwoRoomApt implements Apartment {
void clean2Rooms() {
System.out.println("2 rooms have been cleaned");
}
}
static class ThreeRoomApt implements Apartment {
void clean3Rooms() {
System.out.println("3 rooms have been cleaned");
}
}
}