METHOD OVERRIDING IN JAVA

In object oriented programming, method overriding is a language feature that allows a subclass to provide a specific implementation of a method that is already provided by one of its super classes. The implementation in the subclass overrides (replaces) the implementation in the super class. Hence, overridden method is always executed from the object whose object is stored in referenced variable. Super class method is called overridden method, and subclass method is called overriding method. It is also known as covariant return type with a method having return type.

Example –

class Example

{

          void add(int a,int b)

          {

                   System.out.println("(int,int) in Example : "+(a+b));

          }

          void sub(int a,int b)

          {

                   System.out.println("(int,int) in Example : "+(a-b));

          }

}

public class Overridding extends Example{

          void add(int a, int b)

          {

                   System.out.println("add(int,int) in Overridding");

                   System.out.println("the addition of "+a+" and "+b+" is = "+(a+b));

          }

          public static void main(String[] args) {

                   Overridding o = new Overridding();

                   o.add(10, 20);

                   o.sub(10, 20);

          }

}

Output –

add(int,int) in Overridding

the addition of 10 and 20 is = 30

(int,int) in Example : -10