Question: Can We Have This () And Super () Together?

Can constructor be overloaded?


Java supports constructor overloading.

In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters..

Can we override static method?

Can we Override static methods in java? We can declare static methods with same signature in subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’.

Can you make constructor final?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. As mentioned previously, the final modifier prevents a method from being modified in a subclass. … In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.

Can super and this be used together?

We can’t use both the keywords in the constructor. In Java there is a rule that this() and super() must be first statement in the constructor. So we can’t use both together in a constructor. … super() calls the base class constructor & this() calls the current class constructor.

What would be the Behaviour If this () and super () used in a method?

What would be the behaviour if this() and super() used in a method? Explanation: this() and super() cannot be used in a method. This throws compile time error. … Explanation: Class class provides list of methods for use like getInstance().

Can we use both this () and super () inside a constructor?

Both this() and super() are constructor calls. Constructor call must always be the first statement. So you either have super() or this() as first statement. Both this() and super() are constructor calls, and constructor call must be the first (and only first) call in a constructor.

Can a constructor be private and how are this () and super () method used with constructor?

Yes. Class can have private constructor. … By making constructor private, we prevent the class from being instantiated as well as subclassing of that class. To give meaningful name for object creation using static factory method.

Why we Cannot use this and super in static method?

A static method or, block belongs to the class and these will be loaded into the memory along with the class. … This implies that to use “super” the method should be invoked by an object, which static methods are not. Therefore, you cannot use “super” keyword from a static method.

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

Difference between super() and this() in java Program this keyword mainly represents the current instance of a class. On other hand super keyword represents the current instance of a parent class. this keyword used to call default constructor of the same class.

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.

Why we Cannot override static method?

Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.

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.

Can abstract class have constructor?

Yes, Abstract Classes can have constructors ! Abstract class can have a constructor though it cannot be instantiated. But the constructor defined in an abstract class can be used for instantiation of concrete class of this abstract class.

What is super () Java?

The super keyword refers to superclass (parent) objects. It is used to call superclass methods, and to access the superclass constructor.

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.