I don't get it. My ThreeBedroomApt class is all these thing and it's still not passing

Question about the task

Inheriting an inner class

Java Multithreading, Level 4, Lesson 4

Resolved

the class that is failing is also all the things it is telling me I am failing for. Thanks for your time in advance.

package com.codegym.task.task24.task2406; import java.math.BigDecimal; /* Inheriting an inner class */ public class Solution { public static class Building { public static class Hall { private BigDecimal area; public Hall(BigDecimal area) { this.area = area; } } public static class Apartment { } } public static class ThreeBedRoomApt extends Building.Apartment { } public static class BigHall extends Building.Hall { public BigHall(BigDecimal area) { super(area); } } public static void main(String[] args) { } }

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Jonas

Level 41 , Vilnius, Lithuania

16 May 2020, 09:07

Everything is fine, it just says ThreeBedroomApt class, not ThreeBedRoomApt ^

Seb

Level 41 , Crefeld, Germany

29 January 2020, 10:42

This indeed is somehow a little confusing topic. The example task is related to the last part of the previous lesson with the Car, Door and LamborginiDoor example (https://codegym.cc/quests/lectures/questmultithreading.level04.lecture03). All classes in this task should not be static. Both classes (ThreeBedroomApt and BigHall) need to be passed a building object as a parameter in their constructor - such as public ThreeBeedroomApt(Building building). The BigHall class should also have a second parameter in its constructor (BigDecimal area). Then you need to call super in both constructors on the passed building object - very much as in the Car, Door, LamborginiDoor example. Eventually the building.super call in the BigHall constructor also needs to be passed an argument... ;-) I hope this helps.

Jason

Level 26 , Rancho Cucamonga, United States

29 January 2020, 18:35

So, I think I did everything you said and made everything non-static and then made constructors with Building parameters and then called super on them along with BigHall getting BigDecimal passed to it. Anyways I'm getting the exact same validations basically saying that every thing in the ThreeBedroomArt class is wrong.

public class Solution {
    public class Building {
        public class Hall {
            private BigDecimal area;

            public Hall(BigDecimal area) {
                this.area = area;
            }
        }

        public class Apartment {
        }
    }

    public class ThreeBedRoomApt extends Building.Apartment {
        public ThreeBedRoomApt(Building building) {
            building.super();
        }
    }
    public class BigHall extends Building.Hall {

        public BigHall(Building building, BigDecimal area) {
            building.super(area);
        }
    }

Seb

Level 41 , Crefeld, Germany

30 January 2020, 15:38

solution

Just a little side note for anybody else who might struggle at this point: The above code is generally correct - it's just missing the package, import and main method. However, the code does not pass unless you rename the passed BigDecimal area parameter to another name such as bigDecimal. It seems the validator has a problem with the "area" variable. Once that's renamed, the code passes. I hope this issue will be fixed - or maybe somebody can explain why one could not name the passed parameter in the BigHall constructor "area"?

Johannes

Level 27 , Centurion, Pretoria, South-Africa

5 May 2020, 10:35

I think it was fixed, as I passed with about the same code.

Andrei

Level 41

8 April 2021, 07:45

I passed with making the code like Jason but having the Building, Apartment and Hall classes static, because, if I remember correctly, you can have a static inner class without creating an instance of the super class.