Java inheritance - constructors

Question

While studying for my finals, I came across the following statement in the book from which I am currently studying. Considering the following code :

class A         


        

Answer 1

It is neccessary to call constructor of super class in case of Java. Therefore, whenever you generate constructor of sub class, super class' constructor is self created by IDE.

It is because whenever base class constructor demands arguments, compiler thinks they are to be filled by base class constructor. In case of default constructor, it is OK. No need to call super() in sub class.