polymorphism

What is Polymorphism in Java?

Polymorphism is considered one of the important features of Object-Oriented Programming. Polymorphism allows us to perform a single action in different ways. In other words, polymorphism allows you to define one interface and have multiple implementations. The word “poly” means many and “morphs” means forms, So it means many forms.

Method Overloading

// Java Program for Method overloading
// By using Different Types of Arguments

// Class 1
// Helper class
class Helper {

	// Method with 2 integer parameters
	static int Multiply(int a, int b)
	{
		// Returns product of integer numbers
		return a * b;
	}

	// Method 2
	// With same name but with 2 double parameters
	static double Multiply(double a, double b)
	{
		// Returns product of double numbers
		return a * b;
	}
}

// Class 2
// Main class
class GFG {
	// Main driver method
	public static void main(String[] args)
	{
		// Calling method by passing
		// input as in arguments
		System.out.println(Helper.Multiply(2, 4));
		System.out.println(Helper.Multiply(5.5, 6.3));
	}
}

2. Operator Overloading

It is a feature in C++ where the operators such as +, -, *, etc. can be given additional meanings when applied to user-defined data types.

3. Template

it is a powerful feature in C++ that allows us to write generic functions and classes. A template is a blueprint for creating a family of functions or classes.

Runtime Polymorphism in Java

// Java Program for Method Overriding

// Class 1
// Helper class
class Parent {

	// Method of parent class
	void Print()
	{

		// Print statement
		System.out.println("parent class");
	}
}

// Class 2
// Helper class
class subclass1 extends Parent {

	// Method
	void Print() { System.out.println("subclass1"); }
}

// Class 3
// Helper class
class subclass2 extends Parent {

	// Method
	void Print()
	{

		// Print statement
		System.out.println("subclass2");
	}
}

// Class 4
// Main class
class GFG {

	// Main driver method
	public static void main(String[] args)
	{

		// Creating object of class 1
		Parent a;

		// Now we will be calling print methods
		// inside main() method

		a = new subclass1();
		a.Print();

		a = new subclass2();
		a.Print();
	}
}