polymorphism in java
// Polymorphism in java example
class Shapes
{
public void sides()
{
System.out.println("sides() method.");
}
}
class Square extends Shapes
{
public void sides()
{
System.out.println("square has four sides.");
}
}
class Triangle extends Shapes
{
public void sides()
{
System.out.println("triangle has three sides.");
}
}
class PolymorphismExample
{
public static void main(String[] args)
{
Shapes shape = new Shapes();
Shapes square = new Square();
Shapes triangle = new Triangle();
shape.sides();
square.sides();
triangle.sides();
}
}
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 MyMainClass {
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();
}
}
class Animal {
public void animalSound() {
System.out.println("The animal makes a sound");
}
}
class Pig extends Animal {
public void animalSound() {//override superclass method
System.out.println("The pig says: wee wee");
}
}
class Dog extends Animal {
public void animalSound() {//override superclass method
System.out.println("The dog says: bow wow");
}
}
class Main {
public static void main(String[] args) {
//You can add all objects inherited from Animal to an Animal type list
Animal[] animals = new Animal[3]; //Creating the Animal List
animals[0] = new Animal(); //Add a new animal object to the list
animals[1] = new Dog(); //Add a new dog object to the list
animals[2] = new Pig(); //Add a pig object to the list
for (Animal a: animals){
a.animalSound(); //This statement prints the correct string no matter the class
}
}
}