What is the use of subclass constructor?

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.

A subclass inherits all the members (fields, methods, and nested classes) from its superclass. Constructors are not members, so they are not inherited by subclasses , but the constructor of the superclass can be invoked from the subclass.

Does a Subclass need to have a constructor? Yes, the subclass has its own constructor , either explicit or implicitly created.