A subclass needs a constructor if the superclass does not have a default constructor (or has one that is not accessible to the subclass). If the subclass has no constructor at all, the compiler will automatically create a public constructor that simply calls through to the default constructor of the superclass.
Read moreHow do you call a super class constructor in SAP?
The superclass constructor can be called using super->constructor only as a standalone statement.
Read moreHow do you call a constructor from another class constructor?
To call one constructor from another constructor is called constructor chaining in java. This process can be implemented in two ways: Using this() keyword to call the current class constructor within the “same class”. Using super() keyword to call the superclass constructor from the “base class”.
Read moreCan a constructor be call from a constructor?
Yes , any number of constructors can be present in a class and they can be called by another constructor using this() [Please do not confuse this() constructor call with this keyword]. this() or this(args) should be the first line in the constructor. This is known as constructor overloading.
Read moreCan constructor be inherited through a subclass that calls the superclass constructor?
Super class’s Constructor in inheritance In inheritance constructors are not inherited . You need to call them explicitly using the super keyword.
Read moreWhat does a class inherit when it extends another class?
Summary. As you’ve seen, inheritance is a powerful concept that enables you to implement a subclass that extends a superclass. By doing that, the subclass inherits all protected and public attributes and methods, and the types of the superclass .
Read moreDoes subclass call superclass constructor?
Thus, when a subclass object is instantiated the subclass object must also automatically execute one of the constructors of the superclass . To call a superclass constructor the super keyword is used. The following example programs demonstrate use of super keyword.
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