Inheritance enables you to create new classes that reuse, extend, and modify the behavior defined in other classes. The class whose members are inherited is called the base class, and the class that inherits those members is called the derived class . A derived class can have only one direct base class.
Read moreWhat is the base object in Java?
The Object class is the parent class of all the classes in java by default . In other words, it is the topmost class of java. The Object class is beneficial if you want to refer any object whose type you don’t know. Notice that parent class reference variable can refer the child class object, know as upcasting.
Read moreIs there any method to call a subclass constructor from a superclass constructor?
No, we cannot call subclass constructor from superclass constructor .
Read moreDo I have to call superclass constructor in subclass?
Invocation of a superclass constructor must be the first line in the subclass constructor. super(); or: super(parameter list);
Read moreHow do you call superclass in subclass?
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 .
Read moreCan we call superclass constructor from subclass constructor in Java?
You cannot call a sub -class constructor from a super-class constructor.
Read moreCan we use constructor in subclass?
The constructors of the subclass can initialize only the instance variables of the subclass . 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.
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