A
Ajay Raja
Guest
Virtual functions means?[To be discussed]
What is polymorphism?
- Polymorphism means "many forms".
- it occurs when we have many classes that are related to each other by inheritance.
- Polymorphism allows us to perform a single action in different ways.
Why we need Polymorphism?
- Polymorphism is a core concept in oops, is used to create more flexible, reusable, and maintainable code.
Key features of polymorphism:
1.Method Overriding
2.Method Overloading
1.Method Overriding:
- This should be called as Run time polymorphism.
- A child class can redefine a method of its parent class.
- Overriding in Java occurs when a subclass or child class implements a method that is already defined in the superclass or base class.
- The subclass method must match the parent class method's name, parameters, and return type.
Why we use @override[To be disscused]
2.Method Overloading:
- This should be called as compile-time polymorphism.
- We can define multiple methods with the same name but different parameters.
- The parameter lists of overloaded methods must differ.
Code:
Number of parameters:
For example,
add(int a, int b) and add(int a, int b, int c).
Data types of parameters:
For example,
display(int x) and display(String s).
Order of parameters:
For example, print(int a, double b) and print(double b, int a)
1)Compile time polymorphism:
Compile-Time Polymorphism in Java is also known as static polymorphism and also known as method overloading.
This happens when multiple methods in the same class have the same name but different parameters.
2)Run time polymorphism:
- Runtime Polymorphism in Java known as Dynamic Method Dispatch.
Dynamic Methods Dispatch means??[TBD]
Early Binding:[static]
- The binding which can be resolved at compile time by the compiler is known as static or early binding.
Late binding:[dynamic]
- compiler doesn't decide the method to be called
- Overriding is a perfect example of dynamic binding.
- In overriding both parent and child classes have the same method.
Continue reading...
