Question

Java: Create a class called Vehicle

with the following features:

a.

It has three private data members (instance variables): one is the

manufacturer’s name (String manufacturer), the second is the number of

cylinders in the engine (int cylinder), and the third is the owner (Person

owner). The class Person is described above.

b.

It has three constructors, a no-argument constructor, a constructor with three

parameters, and a copy constructor. The no-argument constructor will set the

manufacturer to “None”, cylinder to 0, and owner’s name to an empty string

“”. The three parameter constructor will set the manufacturer to the value of

the first parameter, cylinder to the value of the second parameter, and owner to a

copy of the third parameter. The copy constructor has a parameter of type

Vehicle, and it creates a new object which is an exact copy of its argument

object.

c.

It has three accessor methods (getManufacturer, getCylinder, getOwner) and

three mutator methods (setManufacturer, setCylinder, setOwner).

d.

It has a toString method that returns a string containing the manufacturer’s

name, number of cylinders, and the owner’s name. (For example,“manufacturer=Ford, cylinder= 4, owner’s Name =Bob”)

e.

It has an equals method that returns true if two independent Vehicles are

identical.

Thank you for any help

Answer 1

JAVA CODE:

class Person {

    private String name;

    public Person(String name) {

        this.name = name;

    }

    public String getName() {

        return this.name;

    }

    public void setName(String name) {

        this.name = name;

    }

}

class Vehicle {

    private String manufacturer;

    private int cylinder;

    private Person owner;

    // No-argument constructor

    public Vehicle() {

        this.manufacturer = "None";

        this.cylinder = 0;

        this.owner = new Person("");

    }

    // Constructor

    public Vehicle(String manufacturer, int cylinder, Person owner) {

        this.manufacturer = manufacturer;

        this.cylinder = cylinder;

        this.owner = new Person(owner.getName());

    }

    // Copy constructor

    public Vehicle(Vehicle v) {

        this.manufacturer = v.manufacturer;

        this.cylinder = v.cylinder;

        this.owner = new Person(v.owner.getName());

    }

    // Accessor methods

    public String getManufacturer() {

        return this.manufacturer;

    }

    public int getCylinder() {

        return this.cylinder;

    }

    public Person getOwner() {

        return this.owner;

    }

    // Mutator methods

    public void setManufacturer(String manufacturer) {

        this.manufacturer = manufacturer;

    }

    public void setCylinder(int cylinder) {

        this.cylinder = cylinder;

    }

    public void setOwner(Person owner) {

        this.owner = new Person(owner.getName());

    }

    public String toString() {

        return "manufacturer = " + this.manufacturer + ", cylinder = " + this.cylinder + ", owner\'s Name = "

                + this.owner.getName();

    }

    public boolean equals(Vehicle v) {

        return this.manufacturer.equals(v.manufacturer) && this.cylinder == v.cylinder

                && this.owner.getName().equals(v.owner.getName());

    }

}

class Main {

    public static void main(String[] args) {

        Vehicle v1 = new Vehicle("Audi", 8, new Person("John"));

        Vehicle v2 = new Vehicle(v1);

        v1.setCylinder(9);

        System.out.println(v1);

        System.out.println(v2);

        System.out.println(v1.equals(v2));

    }

}

OUTPUT:

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