Write an abstract superclass encupsulating a vehicle: A vehicle has two attribut

Question

Write an abstract superclass encupsulating a vehicle: A vehicle has two attributes it's owner's name and it's number of wheels. This class has two nonabstract subclasses: one encapsulating a bicycle, and the other encapsulating a motorized vehicle. A motorized vehicle has the following additional attributes: it's engine volume displacement, in liters; and a method computing and returning a measure of horsepower, the number of liters times the number of wheels. You also need to include a client class to test these two classes.

Explanation / Answer

Vehicle.java

public abstract class Vehicle {
   //Declaring variables
   String owner_name;
   int no_of_wheels;
  
   //Parameterized constructor
   public Vehicle(String owner_name, int no_of_wheels) {
       super();
       this.owner_name = owner_name;
       this.no_of_wheels = no_of_wheels;
   }
  
   //Setters and getters
   public String getOwner_name() {
       return owner_name;
   }
   public void setOwner_name(String owner_name) {
       this.owner_name = owner_name;
   }
   public int getNo_of_wheels() {
       return no_of_wheels;
   }
   public void setNo_of_wheels(int no_of_wheels) {
       this.no_of_wheels = no_of_wheels;
   }
  
   //toString() method is used to display the contents of an Vehicle class object
   @Override
   public String toString() {
       return "Owner Name=" + owner_name + " No of wheels="
               + no_of_wheels;
   }

}

_________________

Bicycle.java

public class Bicycle extends Vehicle {

   //Parameterized constructor
   public Bicycle(String owner_name, int no_of_wheels) {
       super(owner_name, no_of_wheels);
  
   }
  
   //toString() method is used to display the contents of an Bicycle class object
   @Override
   public String toString() {
       System.out.println("Bicycle#");
       System.out.println(super.toString());
       return "";
   }
  
}

_____________________

MotorVehicle.java

public class MotorVehicle extends Vehicle {
   //Declaring variable
   int engine_volume;

   //Parameterized constructor
   public MotorVehicle(String owner_name, int no_of_wheels, int engine_volume) {
       super(owner_name, no_of_wheels);
       this.engine_volume = engine_volume;
   }

  
   //getters and setters
   public int getEngine_volume() {
       return engine_volume;
   }

   public void setEngine_volume(int engine_volume) {
       this.engine_volume = engine_volume;
   }

   //Method which calculates the house power
   public double calHorsePower()
   {
       return engine_volume*no_of_wheels;
   }
  
  
   //toString() method is used to display the contents of an Motorvehicle class object
   @Override
   public String toString() {
       System.out.println("MotorVehicle#");
       System.out.println(super.toString());
       return "Engine volume=" + engine_volume;
   }
  

}

_____________________

Client.java

public class Client {

   public static void main(String[] args) {

       //Creating an Bicycle class object by passing the inputs as arguments
       Bicycle bicycle=new Bicycle("Williams",2);
      
       //Creating an MotarVehicle class object by passing the inputs as arguments
       MotorVehicle motorCar=new MotorVehicle("Johnson",4,20);
      
       //Displaying the contents of an Bicycle class object
       System.out.println(bicycle.toString());
      
       //Displaying the contents of an MotorVehicle class object
       System.out.println(motorCar.toString());
      
       //Displaying the horse power of the MotorVehicle
       System.out.println("Hose Power of Motor car is :"+motorCar.calHorsePower());
      

   }

}

________________

output:

Bicycle#
Owner Name=Williams
No of wheels=2

MotorVehicle#
Owner Name=Johnson
No of wheels=4
Engine volume=20
Hose Power of Motor car is :80.0

__________Thank You

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