USING SUPER

The two major uses of super keyword are: 

    To call the superclass constructor. super () must always be the first statement executed inside a subclass’ constructor.

Ex: class Base{

 int a,b;

 Base(int x,int y) {

  a=x;

  b=y;

 }

}

class Derive extends Base{

 int c;

 Derive(int x,int y,int z) {

super(x,y); //Calling Base class constructor

  c=z;

 }

}

     super keyword can be used to access a member of the superclass that has been hidden by a member of a subclass. This usage has the following general form:

   super.member

Ex: class Base{

 int a;

 Base(int x) {

  a=x;

}

}

class Derive extends Base{

 int a;

 Derive(int x,int y) {

super.a=x; //Calling Base class constructor

  a=y;

 }

 void Show() {

  System.out.println(“ A is superclass: “ +super.a);

  System.out.println(“ A is subclass: “ +a);

}