What is Polymorphism?

In OOPS, it refers to the capability of objects to react differently to the same method. Polymorphism can be implemented in the Java language in the form of multiple methods having the same name. Java code uses a late-binding technique to support polymorphism; the method to be invoked is decided at runtime.

TYPES : Overloading and Overriding

Overloading

Overriding

class Base  {
               void print()    {
               System.out.println("Base");
               }
  }          
  class Derived extends Base  {
               void print()    {
                System.out.println("Derived");
                }
               public static void main(String args[])      {
                           Base obj = new Derived();
                           obj.print();// "Derived" is printed   
               }
  }

To invoke the superclass version of an overridden method from the subclass, use super.methodName(). In the above example, the subclass can use the functionality of the superclass print() method by calling super.print(). Methods declared as final cannot be overridden by subclasses. Even though constructors can be overloaded, they cannot be overridden because they are not inherited.

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