Create a class called vehicle that has the manufacturer\'s name (type string), n

Question

Create a class called vehicle that has the manufacturer's name (type string), number of cylinders in the engine (type int) and owner (type person given next) Then, create a class called Truck that is derived from vehicle and has the following additional properties: the load capacity in tons (type double since it may contain a fractional part) and towing capacity in pounds (type int) Be sure your class has a reasonable complement of constructors, accessor and mutator methods, and suitably defined equals and tostring methods. Write a program to test all your methods. The definition of the class Person follows. Completing the definitions of the methods is part of this programming project. public class Person { public Person() {...} public Person (String theName) {...} public Person (Person the Object) {...} public string getName() {...} public void setName (String theName) {...} public String tostring() {...} public boolean equals object other) {...} }

Explanation / Answer

Person.java

public class Person {

   //Declaring instance variables
       private String name;

      
       //Zero argumented constructor
       public Person() {
           super();
       this.name="";
       }
      
       //Parameterized constructor
       public Person(String name) {
           super();
           this.name = name;
       }
      
       //Copy Constructor
       public Person(Person theObject) {
           super();
           this.name = theObject.name;
       }
      

       //getters and setters
       public String getName() {
           return name;
       }
       public void setName(String name) {
           this.name = name;
       }
  
       //This method compares two Person Objects
       @Override
       public boolean equals(Object obj) {
           if (this == obj)
               return true;
           if (obj == null)
               return false;
           if (getClass() != obj.getClass())
               return false;
           Person other = (Person) obj;
           if (name == null) {
               if (other.name != null)
                   return false;
           } else if (!name.equals(other.name))
               return false;
           return true;
       }
      
       //toString method is used to display the contents of an object inside it
       @Override
       public String toString() {
           return "Person [name=" + name + "]";
       }

}

______________________

Vehicle.java

public class Vehicle {
  
   //Declaring instance variables
   private String manufactures_name;
   private int no_of_cylinders;
   private Person owner;
  
   //Parameterized constructor
   public Vehicle(String manufactures_name, int no_of_cylinders, Person owner) {
       super();
       this.manufactures_name = manufactures_name;
       this.no_of_cylinders = no_of_cylinders;
       this.owner = owner;
   }
  

   //getters and setters
   public String getManufactures_name() {
       return manufactures_name;
   }
   public void setManufactures_name(String manufactures_name) {
       this.manufactures_name = manufactures_name;
   }
   public int getNo_of_cylinders() {
       return no_of_cylinders;
   }
   public void setNo_of_cylinders(int no_of_cylinders) {
       this.no_of_cylinders = no_of_cylinders;
   }
   public Person getOwner() {
       return owner;
   }
   public void setOwner(Person owner) {
       this.owner = owner;
   }
  
   //toString method is used to display the contents of an object inside it
   @Override
   public String toString() {
       return " Manufactures Name=" + manufactures_name
               + ", No Of Cylinders=" + no_of_cylinders + ", owner=" + owner;
   }
  

}

______________________

Truck.java

public class Truck extends Vehicle {
  
   //Declaring instance variables
private double load_capacity;
private int towing_capacity;

//Parameterized constructor
public Truck(String manufactures_name, int no_of_cylinders, Person owner,
       double load_capacity, int towing_capacity) {
   super(manufactures_name, no_of_cylinders, owner);
   this.load_capacity = load_capacity;
   this.towing_capacity = towing_capacity;
}

//getters and setters
public double getLoad_capacity() {
   return load_capacity;
}
public void setLoad_capacity(double load_capacity) {
   this.load_capacity = load_capacity;
}
public int getTowing_capacity() {
   return towing_capacity;
}
public void setTowing_capacity(int towing_capacity) {
   this.towing_capacity = towing_capacity;
}

//toString method is used to display the contents of an object inside it
@Override
public String toString() {
   return super.toString()+" load_capacity=" + load_capacity + ", towing_capacity="
           + towing_capacity;
}

}

___________________

Test.java

public class Test {

   public static void main(String[] args) {
       //Creating Person Class Object P1
   Person p1=new Person("Kane Williams");
  
   //Creating Person Class Object P2
   Person p2=new Person(p1);
  
   //Comparing Person P1 and person P2 class objects
   boolean bool=p1.equals(p2);
   if(bool)
       System.out.println("The Persons P1 and P2 are Equal");
   else
       System.out.println("The Persons P1 and P2 are not Equal");

   //Creating Person Class Object P3
   Person p3=new Person();
   p3.setName("Johnson");

   //Comparing Person P1 and person P3 class objects
   boolean bool1=p2.equals(p3);
   if(bool)
       System.out.println("The Persons P2 and P3 are Equal");
   else
       System.out.println("The Persons P2 and P3 are not Equal");

   //Creating Truck Class Object
   Truck t=new Truck("Mahindra",4, p1,5000,4000);
  
   //Displaying the truck class info
   System.out.println(t.toString());
  

   }

}

_____________________

Output:

The Persons P1 and P2 are Equal
The Persons P2 and P3 are Equal
Manufactures Name=Mahindra, No Of Cylinders=4, owner=Person [name=Kane Williams] load_capacity=5000.0, towing_capacity=4000

_______Thank You

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