What is this keyword and why is it used in inheritance of Java?

The this keyword refers to the current object in a method or constructor. The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter). Return the current class object.

What is this and super keyword in Java?

super keyword is used to access methods of the parent class while this is used to access methods of the current class. this keyword. this is a reserved keyword in java i.e, we can’t use it as an identifier. this is used to refer current-class’s instance as well as static members.

How do I use this keyword?

Following are the ways to use ‘this’ keyword in java :

1. Using ‘this’ keyword to refer current class instance variables.
2. Using this() to invoke current class constructor.
3. Using ‘this’ keyword to return the current class instance.
4. Using ‘this’ keyword as method parameter.
5. Using ‘this’ keyword to invoke current class method.

What does this () do in Java?

this keyword in Java is a reference variable that refers to the current object of a method or a constructor. The main purpose of using this keyword in Java is to remove the confusion between class attributes and parameters that have same names.

Which is the keyword used for inheritance in Java?

The keyword used for inheritance is extends. Example: In below example of inheritance, class Bicycle is a base class, class MountainBike is a derived class which extends Bicycle class and class Test is a driver class to run program.

When do you use this keyword in Java?

‘this’ is a reference variable that refers to the current object. 1. Using ‘this’ keyword to refer current class instance variables 2. Using this () to invoke current class constructor 3. Using ‘this’ keyword to return the current class instance

How does inheritance work in Multilevel inheritance in Java?

2. Multilevel Inheritance: In Multilevel Inheritance, a derived class will be inheriting a base class and as well as the derived class also act as the base class to other class. In the below image, class A serves as a base class for the derived class B, which in turn serves as a base class for the derived class C.

What do you call a class that inherits another class in Java?

Super Class: The class whose features are inherited is known as superclass (or a base class or a parent class). Sub Class: The class that inherits the other class is known as a subclass (or a derived class, extended class, or child class). The subclass can add its own fields and methods in addition to the superclass fields and methods.