L$13$ Homework: Gym Equipment

Problem Description

Hello! Please make sure to read all parts of this document carefully.

In this assignment, you will be applying your knowledge of interfaces and Comparable to write

one interface and some classes that can be used to simulate the management of equipment in

a gym.

Solution Description

You will write one interface, Adjustable, and five classes: FreeWeight, Barbell, Dumbbell,

WeightMachine, and Gym. Each will be written in its own file $($named accordingly$).$

You must use constructor chaining when it's applicable:

If a class has $N$ constructors, it will use "this" constructor chaining $N-1$ times

A class will use "super" constructor chaining at most once. It may only be used in

the constructor that has all the appropriate parameters. You will use it if and

only if$,$ in that constructor, the implicit "super" constructor chaining is not

appropriate

Visibility for required elements:

All classes, methods, and constructors must be public

All variables must be private

You may add to aid you $($if you want$)$

Methods, if they are private

Variables, if they are private static final

You may not add any other classes or constructors

You will also be provided with an additional class, FreeWeightConcrete $($in an appropriately

named file$).$ This class is used for autograding purposes, as we need a way to test the class that

we cannot directly instantiate. You need to familiarize yourself with this class, as it will help

you understand autograder error messages related to the type which it is replacing. This file is

error$-$free, and error messages related to it are actually errors about the related type. You

must not change it in any way, and you must submit it along with your other files in your

submission.

Adjustable

It represents objects that can be$,$ in some way, adjusted in their weight. This is an interface. It

will have:

boolean adjustWeight $($int$)$ abstract method. The parameter is the desired

adjustment, and the return value is to indicate whether it could be applied successfully.