It is required if the parameterized constructor (a constructor that takes arguments) of the superclass has to be called from the subclass constructor . The parameterized super() must always be the first statement in the body of the constructor of the subclass, otherwise, we get a compilation error.
Read moreShould super be the first line in constructor?
Subclass Constructors Invocation of a superclass constructor must be the first line in the subclass constructor. super(); … Object does have such a constructor, so if Object is the only superclass, there is no problem.
Read moreWhy super is called first in constructor?
Actually, super() is the first statement of a constructor because to make sure its superclass is fully-formed before the subclass being constructed . Even if you don’t have super() in your first statement, the compiler will add it for you!12 Mar 2017
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