Question

Create four classes named: Planet, solarSystem, Earth and Moon,

1. Think how to use inheritance in three classes

2. solarSystem has

Name, color, Diameter_Miles, dist_From_Sun and perimeter =(float) 3.14*Diameter_Miles;

3. Moon has the following attributes:

Name, color, Diameter_Miles, dist_From_Sun, surface_area = 4*3.14*Radius*Radius;

And volume = (4/3)*(3.14)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles);

4. Planet has the following attributes:

Name, color, Diameter_Miles, dist_From_Sun and volume = (4/3)*(3.14)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles);

5. Earth has the following attributes:

Name, color, Diameter_Miles, dist_From_Sun and volume = (4/3)*(3.14)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles);

Every class has constructor to initialize the input variables and measurements Method that prints the following:

From the solarSystem Class consider the following inputs: name ="solar System", color="multi", Diameter_Miles=7500000000L, dist_From_Sun =3666000000L

The output should be:

Name Of The solarSystem : solar System

Colour Of The solarSystem : multi

Distance From the Sun : 3666000000 miles

Perimeter of the solarSystem : 2.35500012E10 miles

--------------------------------------

From the Planet Class consider the following inputs: name =" Earth ", color=" blue", Diameter_Miles=3959L, dist_From_Sun =93000000L

The output should be:

Name Of The Planet : Earth

Colour Of The Planet : blue

Distance From the Sun is : 93000000 miles

Volume Of The Planet : 1.9484360366806003E11 cubic units

From the Earth Class consider the following inputs: name =" Earth ", color=" blue", Diameter_Miles=3959L, dist_From_Sun =93000000L

The output should be:

Name Of The Planet : Earth

Colour Of The Planet : blue

Distance From the Sun is : 93000000 miles

Volume Of The Planet : 1.9484360366806003E11 cubic units

-----------------

From the Moon Class consider the following inputs: name =" Luna", color=" silvery ", Diameter_Miles=1740L, dist_From_Sun =238900L

The output should be:

Name Of The Moon : Luna

Colour Of The Moon : silvery

Distance From the Mother Planet : 238900 miles

Surface area Of The Moon : 3.8026656E7 km^2

---------------

java

Answer 1

//Java code

public  class SolarSystem {
    /**
     * Name, color, Diameter_Miles,
     * dist_From_Sun and perimeter =(float) 3.14*Diameter_Miles;
     */
    protected String name;
    protected String color;
    protected float diameter_miles;
    protected  float dist_From_Sun;
    //Constructor

    public SolarSystem(String name, String color, float diameter_miles, float dist_From_Sun) {
        this.name = name;
        this.color = color;
        this.diameter_miles = diameter_miles;
        this.dist_From_Sun = dist_From_Sun;
    }
    //Getters and setters

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public float getDiameter_miles() {
        return diameter_miles;
    }

    public void setDiameter_miles(float diameter_miles) {
        this.diameter_miles = diameter_miles;
    }

    public float getDist_From_Sun() {
        return dist_From_Sun;
    }

    public void setDist_From_Sun(float dist_From_Sun) {
        this.dist_From_Sun = dist_From_Sun;
    }
    public float perimeter()
    {
        return (float) (Math.PI*diameter_miles);
    }

    @Override
    public String toString() {
        return "Name Of The solarSystem : "+name+"\n" +
                "Colour Of The solarSystem : "+color+"\n" +
                "Distance From the Sun : "+dist_From_Sun+" miles\n" +
                "Perimeter of the solarSystem : "+perimeter()+" miles";
    }
}

//=====================================================

public  class Planet extends SolarSystem {
    public Planet(String name, String color, float diameter_miles, float dist_From_Sun) {
        super(name, color, diameter_miles, dist_From_Sun);
    }

    public double volume()
    {
        /**
         * (4/3)*(3.14)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles);
         */
        float radius = (float) (diameter_miles);
        return (float) ((4/3)*(Math.PI)*radius*radius*radius);
    }

    @Override
    public String toString() {
        return "Name Of The Planet : "+name+"\n" +
                "Colour Of The Planet : "+color+"\n" +
                "Distance From the Sun is : "+dist_From_Sun+" miles\n" +
                "Volume Of The Planet : "+volume()+" cubic units";
    }
}

//==================================================

public class Moon extends SolarSystem {
    public Moon(String name, String color, float diameter_miles, float dist_From_Sun) {
        super(name, color, diameter_miles, dist_From_Sun);
    }
    public float surface_area()
    {
        float radius = (float) (diameter_miles);
        return (float) (4*Math.PI*radius*radius);
    }
    public float volume()
    {
        float Radius_Miles = (float) (diameter_miles/2.0);
        return (float) ((4.0/3.0)*(Math.PI)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles));
    }
    @Override
    public String toString() {
        return "Name Of The Moon : "+name+"\n" +
                "Colour Of The Moon : "+color+"\n" +
                "Distance From the Mother Planet : "+dist_From_Sun+" miles\n" +
                "Surface area Of The Moon : "+surface_area()+" km^2";
    }
}

//====================================================

public class Earth extends Planet {
    public Earth(String name, String color, float diameter_miles, float dist_From_Sun) {
        super(name, color, diameter_miles, dist_From_Sun);
    }

    @Override
    public String toString() {
        return super.toString();
    }
}

//==============================================

public class TestPlanet {
    public static void main(String[] args)
    {
        SolarSystem solarSystem = new SolarSystem("Solar System","Multi",7500000000L,3666000000L);
        System.out.println(solarSystem);
        System.out.println("==============================");
        Planet planet = new Planet("Earth","blue",3959L,93000000L);
        System.out.println(planet);
        System.out.println("==============================");
        Earth earth = new Earth("Earth","blue",3959L,93000000L);
        System.out.println(earth);
        System.out.println("==============================");
        Moon moon = new Moon("Luna","silvery",1740L,238900L);
        System.out.println(moon);
        System.out.println("==============================");

    }
}

//Output

//If you need any help regarding this solution .......... please leave a comment ........ thanks