java super.var
class Superclass
{
int num = 100;
}
class Subclass extends Superclass
{
int num = 110;
void printNumber(){
/* Note that instead of writing num we are
* writing super.num in the print statement
* this refers to the num variable of Superclass
*/
System.out.println(super.num);
}
public static void main(String args[]){
Subclass obj= new Subclass();
obj.printNumber();
}
}super keyword in java
Variables and methods of super class can
be overridden in subclass.
In case of overriding , a subclass
object call its own variables and methods.
Subclass cannot access the variables and
methods of superclass because the overridden
variables or methods hides the
methods and variables of super class.
But still java provides a way to access
super class members even if
its members are overridden. Super is
used to access superclass variables, methods, constructors.
Super can be used in two forms :
1) First form is for calling super class constructor.
2) Second one is to call super class variables,methods.
Super if present must be the first statement.Copyright © 2021 Codeinu
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