You need a call to super() if and only if there’s no default constructor (accepting no arguments) for your parent class . In all other cases (where a constructor with zero arguments exists) you don#t have to code it.
Read moreWhat happens if you do not call super () in the subclass constructor?
If a constructor does not explicitly invoke a superclass constructor, the Java compiler automatically inserts a call to the no-argument constructor of the superclass . If the superclass does not have a no-argument constructor, you will get a compile-time error.
Read moreWhat happens if you don’t call super constructor Java?
Note: If a constructor does not explicitly invoke a superclass constructor, the Java compiler automatically inserts a call to the no-argument constructor of the superclass . If the super class does not have a no-argument constructor, you will get a compile-time error.
Read moreWhy do we need to call super constructor?
We use super keyword to call the members of the Superclass . As a subclass inherits all the members (fields, methods, nested classes) from its parent and since Constructors are NOT members (They don’t belong to objects. They are responsible for creating objects), they are NOT inherited by subclasses.8 May 2012
Read moreWhy call to this () must be the first statement in constructor?
this or super needs to be first statement in constructor so that child class constructor invokes parent class constructor first . This is required to initialize any variable in parent class before doing any thing in child constructor.
Read moreWhat is the first statement in constructor?
The reason is that “Constructor call must be the first statement in a constructor”.
Read moreShould be the first statement in the constructor?
The Eclipse compiler says “Constructor call must be the first statement in a constructor”. So, it is not stopping you from executing logic before the call to super . It is just stopping you from executing logic that you can’t fit into a single expression. There are similar rules for calling this().11 Tem 2019
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