Overall specification: To write a simple Java class Car that models a car.

Details

The information stored about each car will include its

$$ make e$.$g$.$ "Ford"; call this variable make

$$ model e$.$g$.$ "Mondeo"; call this variable model

$$ miles per gallon; call this variable milesPerGallon

o you may assume that this is a whole number.

$$ initial purchase price i$.$e$.$ the price when sold for the first time; call this variable initialPurchasePrice

o you may assume that this is a whole number;

$$ purchase price i$.$e$.$ the price when bought by the present owner; call this variable purchasePrice

o you may assume that this is a whole number;

$$ name of owner; call this variable nameOfOwner

o you may assume that this is a single line of text.

$$ number of owners; call this variable numberOfOwners

$$ whether the car has a catalytic converter or not; call this variable hasConverter.

Your class will need to have fields corresponding to these attributes.

Start by opening BlueJ, creating a new project called myCar which has a class called Car and set up the fields that

you need. Make sure that the class compiles before continuing.

Next, you will need to write a constructor for the class. Assume that each car is "built" by creating an object and

specifying its make, model, miles per gallon, initial purchase price and whether it has a catalytic converter.

Therefore, you will need a constructor that allows you to pass arguments to initialise these five attributes in the order

mentioned. Other fields should be set to an appropriate value. Again check that the class compiles before

continuing. If there are errors then you will know that they are caused by the code you have just typed in$.$ Never

type in more than a single method without compiling $--$ otherwise if there are errors then it might be difficult to

know which lines of code have caused the problem.

When the car is sold to the first owner, you will need to set the purchase price and the new owner's name so you will

need mutator methods

$$ setPurchasePrice$()--$ to set the purchase price;

$$ setOwner$()--$ to set the name of the owner.

These methods will also be used when the car is sold on to a subsequent owner.

You should also write the mutator method

$$ goingCleaner$()--$ this method simulates having the car fitted with a catalytic converter so that pollutant

gases are converted into less harmful ones.

$-1-$ Tuesday, $08$ October $2024$

Programming $12024/2025$

To obtain information about a Car object, you should write

$$ accessor methods corresponding to two of the fields:

o getMake$()--$ which returns the make of the car;

o getModel$()--$ which returns the model;

o getPurchasePrice$()--$ which returns the purchase price.

Ideally we should have an accessor method for every attribute that is of interest to us$,$ but three accessor

methods is sufficient for this homework J$.$

$$ an accessor method printDetails$()$ to print, to the terminal window, a report about the car e$.$g$.$

This vehicle is a Ford Mondeo. It has had $2$ owners and its present owner is

Mrs Brown. It does $35$ miles per gallon and does not have a catalytic

converter. The original purchase price was $4500$ and the price is now $3500.$

Check that the new method works correctly by$,$ for example,

o creating a Car object and setting its fields;

o calling printDetails$()$ and checking that the report corresponds to the details you have just

given for the car;

o $$selling$$ the car by calling setOwner$()$ and setPurchasePrice$()$;

o calling printDetails$()$ and checking that the report now prints out the new details..

$$ write a method sell$()$ which simulates $$selling$$ the car.

$$ write an accessor method checkCarConverter$()$ which checks whether the car has a catalytic converter

or not. If the car does not have a converter then this method returns a string containing the message Be

aware that your car could be less polluting, otherwise it returns a string containing This

car is better for the environment.

o Also try to output this message when the constructor is executed.