How do you call superclass in subclass?

No, we cannot call subclass constructor from superclass constructor .

Invocation of a superclass constructor must be the first line in the subclass constructor. super(); or: super(parameter list);

Subclass methods can call superclass methods if both methods have the same name. From the subclass, reference the method name and superclass name with the @ symbol .

You cannot call a sub -class constructor from a super-class constructor.