Java Inheritance constructor super example

A subclass needs a constructor if the superclass does not have a default constructor (or has one that is not accessible to the subclass). If the subclass has no constructor at all, the compiler will automatically create a public constructor that simply calls through to the default constructor of the superclass.

Super class’s Constructor in inheritance In inheritance constructors are not inherited . You need to call them explicitly using the super keyword.

Summary. As you’ve seen, inheritance is a powerful concept that enables you to implement a subclass that extends a superclass. By doing that, the subclass inherits all protected and public attributes and methods, and the types of the superclass .

Thus, when a subclass object is instantiated the subclass object must also automatically execute one of the constructors of the superclass . To call a superclass constructor the super keyword is used. The following example programs demonstrate use of super keyword.

Constructors are not inherited . The superclass constructor can be called from the first line of a subclass constructor by using the keyword super and passing appropriate parameters to set the private instance variables of the superclass.

No a subclass cannot inherit the constructors of its superclass . Constructors are special function members of a class in that they are not inherited by the subclass.