Can you extend a class without constructor?
Can you extend a class without constructor?
A class with no constructors has an implicit public no-argument constructor and yes, as long as it’s not final, it can be sub-classed. If the class has only private constructors then no, it can’t.
Can constructor be overridden?
Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. But, a constructor cannot be overridden. If you try to write a super class’s constructor in the sub class compiler treats it as a method and expects a return type and generates a compile time error.
Do child classes inherit constructors?
Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
Can private classes be extended?
Well, it certainly can! That doesn’t mean it should. Java allows it as extension so it’s a nice feature when properly used.
Can constructor be extended in Java?
Calling Constructors in Superclasses In Java a class can extend another class. When a class extends another class it is also said to “inherit” from the class it extends. The class that extends is called the subclass, and the class being extended is called the superclass.
Can we overload a constructor in Java?
Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.
Do child classes inherit constructors Java?
Constructors can not be inherited. Classes can be inherited, so Child does not inherit any constructor.
Can constructor be private?
Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.
