JAVA EE: Java Tutorial : Inheritance IS-A Relationship Animal (extends)

Wednesday 19 August 2015

Java Tutorial : Inheritance IS-A Relationship Animal (extends)

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https://www.youtube.com/watch?v=6vVLmIiEWQ8&list=UUhwKlOVR041tngjerWxVccw

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AnimalDemo.java

/**
 * Animal is the Super class of Mammal,Parrot and Dove classes
 */
class Animal
{

}

/**
 * Mammal is the subclass of Animal class.
 */
class Mammal extends Animal
{

}

/**
 * Dog is the subclass of both Mammal and Animal classes.
 */
class Dog extends Mammal
{

}

/**
 * Elephant is the subclass of both Mammal and Animal classes.
 */
class Elephant extends Mammal
{

}

/**
 * Tiger is the subclass of both Mammal and Animal classes.
 */
class Tiger extends Mammal
{

}

/**
 * Parrot is the subclass of Animal classes.
 */
class Parrot extends Animal
{

}

/**
 * Dove is the subclass of Animal classes.
 */
class Dove extends Animal
{

}

public class AnimalDemo
{
    public static void main(String args[])
    {

        Mammal mammal = new Mammal();
        Dog dog = new Dog();
        Elephant elephant = new Elephant();
        Tiger tiger = new Tiger();

        System.out.print("Mammal IS-A Animal : ");
        System.out.println(mammal instanceof Animal);
        System.out.println();

        System.out.print("Dog IS-A Mammal : ");
        System.out.println(dog instanceof Mammal);
        System.out.print("Dog IS-A Animal : ");
        System.out.println(dog instanceof Animal);
        System.out.println();

        System.out.print("Elephant IS-A Mammal : ");
        System.out.println(elephant instanceof Mammal);
        System.out.print("Elephant IS-A Animal : ");
        System.out.println(elephant instanceof Animal);
        System.out.println();

        System.out.print("Tiger IS-A Mammal : ");
        System.out.println(tiger instanceof Mammal);
        System.out.print("Tiger IS-A Animal : ");
        System.out.println(tiger instanceof Animal);
        System.out.println();

        Parrot parrot = new Parrot();
        Dove dove = new Dove();

        System.out.print("Parrot IS-A Animal : ");
        System.out.println(parrot instanceof Animal);
        System.out.println();

        System.out.print("Dove IS-A Animal : ");
        System.out.println(dove instanceof Animal);

    }
}

Output

Mammal IS-A Animal : true

Dog IS-A Mammal : true
Dog IS-A Animal : true

Elephant IS-A Mammal : true
Elephant IS-A Animal : true

Tiger IS-A Mammal : true
Tiger IS-A Animal : true

Parrot IS-A Animal : true

Dove IS-A Animal : true