Quick Answer: What Would Be The Behaviour If This () And Super () Used In A Method?

What is the difference between super and super () in Java?

Difference between super and super() The super keyword in Java is a reference variable that is used to refer parent class objects.

The super() in Java is a reference variable that is used to refer parent class constructors.

super can be used to call parent class’ variables and methods..

Can we use this () and super () in a method?

this() and super(), both are the constructors that’s why must be the first statement. But we can use both in a program. this(): It is used to call, same class Default or Parametrized Constructor. super(): It is used to call, immediate super/parent class Default or Parametrized Constructor.

How are this () and super () used with constructors?

How are this() and super() used with constructors? Constructors use this to refer to another constructor in the same class with a different parameter list. Constructors use super to invoke the superclass’s constructor. If a constructor uses super, it must use it in the first line; otherwise, the compiler will complain.

What is super () in Java?

Definition and Usage The super keyword refers to superclass (parent) objects. It is used to call superclass methods, and to access the superclass constructor. The most common use of the super keyword is to eliminate the confusion between superclasses and subclasses that have methods with the same name.

Can abstract class have constructor?

Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.

Why we Cannot override static method?

Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).

What is the difference between super () and this ()?

Difference between super() and this() in java Program On other hand super keyword represents the current instance of a parent class. this keyword used to call default constructor of the same class. … this keyword used to access methods of the current class as it has reference of current class.

What is difference between this and this () in Java?

this is a reference to the object on which behalf the current method was invoked. this(anything) is an invocation of constructor. this(“stackoverflow”); is calling the other constructor in the class (this is called a delegated constructor).

Why super is used in constructor?

The super keyword refers to the parent class. It is used to call the constructor of the parent class and to access the parent’s properties and methods. Tip: To understand the “inheritance” concept (parent and child classes) better, read our JavaScript Classes Tutorial.