Amar

• Dec 19th, 2006

 

constructor can not be created in an abstract class.even though we write the constructor, when the constructor will be called..?only if the object is created. but we cannot create an object of abstract class.even though we create object using indirect way, there also, we cannot call the constructor of the abstract class.finally, constructor for the abstract class cannot be called.

Sonal A. Watane

• Dec 26th, 2006

 

yes, we have constructor in abstract class.An abstract class may have constructors to initialize methods or pass values along to base class constructors.

navneetgoyal2000

 Profile Answers by navneetgoyal2000 Questions by navneetgoyal2000

• Jan 6th, 2011

 

Yes, Abstract Class can have Constructor, infact I would say it SHOULD have constructor.

As ABS class is not a class WITH NO FUNCTIONALITY, it always can HAVE some common functionality.

Please understand that ABS class is meant for GENERALISATION, like ANIMAL Class, PLANT Class, LIQUID class etc.

So, an ABS class can have Constructor, which will be called when an object of its DERIVED class will be instantiated.

(There is a LITTLE difference between an ABS class and an Interface, but YES, there is).

Amms

• Sep 30th, 2011

 

Abstract class constructor can be called from the subclass that is extending this abstract class.

You would define a constructor in an abstract class if you are in one of these situations:

•you want to perform some initialization (to fields of the abstract class) before the instantiation of a subclass actually takes place
•you have defined final fields in the abstract class but you did not initialize them in the declaration itself; in this case, you MUST have a constructor to initialize these fields