A derived Java class can call a constructor in its base class using the super keyword . In fact, a constructor in the derived class must call the super’s constructor unless default constructors are in place for both classes.
Read moreHow do you call a superclass constructor?
To explicitly call the superclass constructor from the subclass constructor, we use super() . It’s a special form of the super keyword.
Read moreHow do you use super in C++?
And C++ doesn’t have a super or base keyword to designate “the base class” , like C# and Java do. One reason for this is that C++ supports multiple inheritance, which would make such a keyword ambiguous. But on the other hand, multiple inheritance is not used so often in C++.26 Ara 2017
Read moreWhat happens when there is no default constructor?
If no user-defined constructor exists for a class A and one is needed, the compiler implicitly declares a default parameterless constructor A::A() . This constructor is an inline public member of its class.
Read moreDoes base class need a default constructor?
A derived class can only be constructed once all base class’ are fully constructed. So it doesn’t matter if you call the base class’ constructor or not . If you don’t call, as long as there is a default constructor available for compiler to determine, it will be called. Otherwise compiler will throw error.
Read moreCan a class have no default constructor?
Not having a default constructor is no problem, as long as you don’t use one . Always specifying an argument at construction is ok, when there is no obvious default argument.11 Kas 2011
Read moreHow do we call constructor of child class?
Define a constructor in the child class To call the constructor of the parent class from the constructor of the child class, you use the parent::__construct(arguments) syntax . The syntax for calling the parent constructor is the same as a regular method.
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