There is an implicit call to super() with no arguments for all classes that have a parent – which is every user defined class in Java – so calling it explicitly is usually not required . However, you may use the call to super() with arguments if the parent’s constructor takes parameters, and you wish to specify them.
Read moreWhat happens if we don’t use constructor for a class?
No-argument constructor If we don’t define a constructor in a class, then the compiler creates a default constructor(with no arguments) for the class .
Read moreWhat is the purpose of super ()?
The super() in Java is a reference variable that is used to refer parent class constructors . super can be used to call parent class’ variables and methods. super() can be used to call parent class’ constructors only.
Read moreWhat if superclass has no constructor?
If the parent has no constructor (Object does have one), the compiler will reject the program . But then, Object is a (direct or indirect) superclass of every class in Java. Suppose, we have a class A , which does not extend any class explicitly, so it implicitly extends Object .
Read moreIs super class constructor always called?
Before you can initialize an object in a constructor, the object’s parent constructor must be called first. … The compiler automatically inserts superclass constructor calls in both constructors .
Read moreDoes super () have to be first in constructor?
Java requires that if you call this() or super() in a constructor, it must be the first statement .
Read moreWhy super keyword is used in constructor?
The super keyword refers to superclass (parent) objects. It is used to call superclass methods, and to access the superclass constructor. The most common use of the super keyword is to eliminate the confusion between superclasses and subclasses that have methods with the same name .
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