Difference between super and final keyword?

Answer 1

this is a reference to the current class

super is a reference to the super class of the current class (the class from which this class extends). You can use super.super if you want to access the second level class. (The class your parent class extends) The purpose of having thisand super keywords is to differentiate between methods and variables in classes that may have the same name as that in the parent class. Under such situations if we want to ensure that only the methods from a particular class only gets called we can use this and super.

Answer 2

If your method overrides one of its superclass's methods, you can invoke the overridden method through the use of the keyword super. You can also use super to refer to a hidden field.

More Elaborately we can say it is used to access members of a class inherited by the class in which it appears. Allows a subclass to accessoverridden methods and hidden members of its superclass. The super keyword is also used to forward a call from a constructor to a constructor in the superclass.

kanak

Answer 3

1)"this" refers to the current class where as "super" refers directly to its immediate above super class. 2)private variables cannot be accessed in a inherited class by using "this",where as by using "super" we can easily access the private variables in its super class.

Answer 4

The super keyword is used to access the methods/variables of the parent class.

Ex:

public class A extends B {

super.getName();

}

This would call the method getName() from class B.

The Final keyword is used to ensure that the methods/variables are not modified/overridden in their child classes.

ex:

public class A {

public void final getName(){

...

}

}

public class B extends A{

public void getName(){

...

}

}

While trying to compile class B, there would be compilation errors. Since the method getName in the parent class is final, it cannot be overridden in the child class.