JAVA POLYMORPHISME PDF

Polymorphism means "many forms", and it occurs when we have many classes that are related to each other by inheritance. Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class. Polymorphism uses those methods to perform different tasks. This allows us to perform a single action in different ways. For example, think of a superclass called Animal that has a method called animalSound.

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Polymorphism means "many forms", and it occurs when we have many classes that are related to each other by inheritance. Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class.

Polymorphism uses those methods to perform different tasks. This allows us to perform a single action in different ways. For example, think of a superclass called Animal that has a method called animalSound. Subclasses of Animals could be Pigs, Cats, Dogs, Birds - And they also have their own implementation of an animal sound the pig oinks, and the cat meows, etc.

Remember from the Inheritance chapter that we use the extends keyword to inherit from a class. Now we can create Pig and Dog objects and call the animalSound method on both of them:. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. HOW TO. Your message has been sent to W3Schools. W3Schools is optimized for learning, testing, and training.

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Polymorphism and inheritance in Java

Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. The dictionary definition of polymorphism refers to a principle in biology in which an organism or species can have many different forms or stages. This principle can also be applied to object-oriented programming and languages like the Java language. Subclasses of a class can define their own unique behaviors and yet share some of the same functionality of the parent class.

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