A subclass can have its own private data members, so a subclass can also have its own constructors . The constructors of the subclass can initialize only the instance variables of the subclass. … To call a superclass constructor the super keyword is used.
Read moreCan a subclass have its own constructor?
A subclass can have its own private data members, so a subclass can also have its own constructors . The constructors of the subclass can initialize only the instance variables of the subclass. … To call a superclass constructor the super keyword is used.
Read moreWhat are constructors in subclass?
Subclass Constructors. This constructor explicitly initializes the cx and cy fields newly defined by PlaneCircle , but it relies on the superclass Circle() constructor to initialize the inherited fields of the class. To invoke the superclass constructor, our constructor calls super(). super is a reserved word in Java.
Read moreWhat are the 4 types of inheritance in Java?
Types of Inheritance in Java
Read moreHow inheritance is implemented in Java?
The implementation of its parent class recreates a new class, which is the child class. To inherit the parent class, a child class must include a keyword called “extends.” The keyword “extends” enables the compiler to understand that the child class derives the functionalities and members of its parent class.
Read moreWhich inheritance is best in Java?
The most important use of inheritance in Java is code reusability . The code that is present in the parent class can be directly used by the child class. Method overriding is also known as runtime polymorphism.
Read moreWhat is a super constructor in Java?
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.
Read more