Question

1. Lets construct a Dog class

2.Declare name, breed and weight as their private variables

3.Add a default constructor

4.Write a constructor with name, breed and weight as arguments

5.Add a toString method to the class

6.Add a equals method

7.Add a copy contructor

8.Add a bark method in Dog class

•This method checks if the weight is greater than 25 , then print (dog.name says woof!) else (dog.name say yip!)

Answer 1

// 1. Lets construct a Dog class
public class Dog {

    // 2.Declare name, breed and weight as their private variables
    private String name;
    private String breed;
    private int weight;

    // 3.Add a default constructor
    public Dog() {
    }

    // 4.Write a constructor with name, breed and weight as arguments
    public Dog(String name, String breed, int weight) {
        this.name = name;
        this.breed = breed;
        this.weight = weight;
    }

    // 5.Add a toString method to the class
    @Override
    public String toString() {
        return "name='" + name + '\'' + ", breed='" + breed + '\'' + ", weight=" + weight;
    }

    // 6.Add a equals method
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Dog dog = (Dog) o;
        return weight == dog.weight && name.equals(dog.name) && breed.equals(dog.breed);
    }

    // 7.Add a copy contructor
    public Dog(Dog dog) {
        this.name = dog.name;
        this.breed = dog.breed;
        this.weight = dog.weight;
    }

    // 8.Add a bark method in Dog class
    public void bark() {
        // This method checks if the weight is greater than 25 , then print (dog.name says woof!) else (dog.name say yip!)
        if (weight > 25) {
            System.out.println(name + " says woof!");
        } else {
            System.out.println(name + " says yip!");
        }
    }

    // Testing the class here. remove this method if not required.
    public static void main(String[] args) {
        Dog dog = new Dog("D", "B", 30);
        dog.bark();
    }
}