Polymorphism in Java

What is polymorphism?
The word polymorphism means having many forms.

The same method can behave differently depending on the object that calls this method.

class Animal {
public void animalSound() {
System.out.println("The animal makes a sound");
}
}

class Pig extends Animal {
public void animalSound() {
System.out.println("The pig says: wee wee");
}
}

class Dog extends Animal {
public void animalSound() {
System.out.println("The dog says: bow wow");
}
class Main {
public static void main(String[] args) {
Animal myAnimal = new Animal(); // Create a Animal object
Animal myPig = new Pig(); // Create a Pig object
Animal myDog = new Dog(); // Create a Dog object
myAnimal.animalSound();
myPig.animalSound();
myDog.animalSound();
}
}

Output:
The animal makes a sound
The pig says: wee wee
The dog says: bow wow

Reference :https://www.w3schools.com/java/java_polymorphism.asp