Implement a java class named Dog that contains information about a dog. The Dog

Question

Implement a java class named Dog that contains information about a dog. The Dog class has the following instance variables (a.k.a. fields or data):

The dog's name
The breed
The age of the dog

The Dog class will have methods to:

Create a new Dog (given a dog's name, breed and age) [constructor]
Create a new Dog (from another Dog) [copy constructor - like cloning a dog]
getName
getBreed
getAge
setName
setBreed
setAge
ageInHumanYears - calculates and returns the dog's age in human years, which is generally estimated as: (if the dog is <= 2 years old, multiply its age * 11, else, subtract the age - 2, multiply by 5 and add 22)
equals - method to check if one Dog is the same as another by comparing all instance variables
toString - method to turn a Dog into a string for display, e.g. display as "Dog [Name=Scooby, Breed=Great Dane, Age=7, Human Age=47]"

Once your Dog class is finished, please create a driver class named DogDemo with a main() method that does the following:

Creates a new Dog object named "scooby" with the following information:
name = "Scooby"
breed = "Great Dane"
age = 7

Creates another Dog object named "myDog" by copying scooby.

Print both objects to the console.

Compare the two Dogs using the equals method. If the Dogs are equal, print the message "Both dogs are the same." Otherwise print the message "The dogs are different."

Now, change each of the fields for "myDog" with mutators (set...) to the following values (if you have a dog, feel free to use your pet's info below instead):
name = "Toby"
breed = "Terrier"
age = 2

Print both objects to the console

Once more, compare the two Dogs using the equals method. If the Dogs are equal, print the message "Both dogs are the same." Otherwise print the message "The dogs are different."

Explanation / Answer

Dog.java

public class Dog {
   //Declaring instance variables
   private String name;
   private String breed;
   private int age;

   //Parameterized constructor
   public Dog(String name, String breed, int age) {
       super();
       this.name = name;
       this.breed = breed;
       this.age = age;
   }

   // Copy constructor
   public Dog(Dog d) {
       this.name = d.name;
       this.breed = d.breed;
       this.age = d.age;
   }
   //getters and setters
   public String getName() {
       return name;
   }

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

   public String getBreed() {
       return breed;
   }

   public void setBreed(String breed) {
       this.breed = breed;
   }

   public int getAge() {
       return age;
   }

   public void setAge(int age) {
       this.age = age;
   }

   //This method will calculate and return the human age
   public int ageInHumanYears() {
       if (age <= 2)
           return age * 11;
       else
           return (age - 2) * 5 + 22;
   }

  
   //this method compares two dog objects
   public boolean equals(Dog d) {

       if (age != d.age)
           return false;
       if (breed == null) {
           if (d.breed != null)
               return false;
       } else if (!breed.equals(d.breed))
           return false;
       if (name == null) {
           if (d.name != null)
               return false;
       } else if (!name.equals(d.name))
           return false;
       return true;
   }

   //toString method is used to display the contents of an object inside it
   @Override
   public String toString() {
       return "Dog [name=" + name + ", breed=" + breed + ", age=" + age + "Human Age ="+ageInHumanYears()+"]";
   }
  

}

_______________________

Driver.java

public class Driver {

   public static void main(String[] args) {
       //Creating the Dog class object by passing values as arguments
       Dog scooby =new Dog("Scooby","Great Dane",7);
      
       System.out.println("---Displaying scooby Dog Object---");
       System.out.println(scooby.toString());
       //Creating the Dog class object by using the copy constructor
       Dog myDog=new Dog(scooby);
       System.out.println("---Displaying myDog Dog Object---");
       System.out.println(myDog.toString());
       System.out.println(" ----Comparing scooby and myDog Dog objects----");
      
       //comparing the two dog class objects
       boolean bool=scooby.equals(myDog);
       if(bool)
           System.out.println("Both dogs are same");
       else
           System.out.println("Both dogs are different");

       //calling the setters
       myDog.setName("Toby");
       myDog.setBreed("Terrier");
       myDog.setAge(2);
      
       System.out.println("---Displaying scooby Dog Object---");
       System.out.println(scooby.toString());
       System.out.println("---Displaying myDog Dog Object---");
       System.out.println(scooby.toString());
      
       System.out.println(" ----Comparing scooby and myDog Dog objects----");
       //comparing the two dog class objects
       bool=scooby.equals(myDog);
       if(bool)
           System.out.println("Both dogs are same");
       else
           System.out.println("Both dogs are different");
      
      
   }
}

____________________

Output:

---Displaying scooby Dog Object---
Dog [name=Scooby, breed=Great Dane, age=7Human Age =47]
---Displaying myDog Dog Object---
Dog [name=Scooby, breed=Great Dane, age=7Human Age =47]

----Comparing scooby and myDog Dog objects----
Both dogs are same
---Displaying scooby Dog Object---
Dog [name=Scooby, breed=Great Dane, age=7Human Age =47]
---Displaying myDog Dog Object---
Dog [name=Scooby, breed=Great Dane, age=7Human Age =47]

----Comparing scooby and myDog Dog objects----
Both dogs are different

_______________Thank You

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