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

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

Exercise: OOP- Inheritance

((((((. java ))))

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

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

Answer 1

class SolarSystem{
   String name, color;
   long Diameter_Miles, dist_From_Sun;
   float perimeter;
  
   public SolarSystem(String name, String color, long Diameter_Miles, long dist_From_Sun){
       this.name = name;
       this.color = color;
       this.Diameter_Miles = Diameter_Miles;
       this.dist_From_Sun = dist_From_Sun;
       this.perimeter = (float)3.14 * Diameter_Miles;
   }
  
   public void measurements(){
       System.out.println("Name Of The solarSystem : "+name);
       System.out.println("Colour Of The solarSystem : "+color);
       System.out.println("Distance From the Sun : "+dist_From_Sun+" miles");
       System.out.println("Perimeter of the solarSystem : "+perimeter+" miles");
   }
}

class Planet extends SolarSystem{
   double volume;
  
   public Planet(String name, String color, long Diameter_Miles, long dist_From_Sun){
       super( name, color, Diameter_Miles, dist_From_Sun);
       long Radius_Miles = Diameter_Miles /2;
       this.volume = (4/3)*(3.14)*(Radius_Miles)*(Radius_Miles)*(Radius_Miles);
   }
  
   public void measurements(){
       System.out.println("Name Of The Planet : "+name);
       System.out.println("Colour Of The Planet : "+color);
       System.out.println("Distance From the Sun is : "+dist_From_Sun+" miles");
       System.out.println("Volume Of The Planet : "+volume+" cubic units");
   }
}

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

class Moon extends Planet{
   double surface_area;
   public Moon(String name, String color, long Diameter_Miles, long dist_From_Sun){
       super( name, color, Diameter_Miles, dist_From_Sun);
       long Radius_Miles = Diameter_Miles /2;
       this.surface_area = 4*3.14*Radius_Miles*Radius_Miles;
   }
  
   public void measurements(){
       System.out.println("Name Of The Moon : "+name);
       System.out.println("Colour Of The Moon : "+color);
       System.out.println("Distance From the Mother Planet : "+dist_From_Sun+" miles");
       System.out.println("Surface area Of The Moon : "+surface_area+" km^2");
   }
  
}

public class Test{
   public static void main(String[] args) throws Exception{
      
       SolarSystem sm = new SolarSystem("solar System","multi",7500000000L,3666000000L);
       sm.measurements();
       Planet p = new Planet(" Earth "," blue",3959L,93000000L);
       p.measurements();
       Earth e = new Earth(" Earth "," blue",3959L,93000000L);
       e.measurements();
       Moon m = new Moon(" Luna"," silvery ",1740L,238900L);
       m.measurements();
   }
}