Can Abstract Class Have Constructor

Yes an abstract class can have a constructor in java.

Can abstract class have constructor. An abstract class constructor c code example will be explained. But we need to make sure that the class which is extending abstract class have a constructor and it should call super class parameterized constructor we can call super class parameterized constructor in sub class by using super call for example. You would provide a constructor for an abstract class if you want to initialise certain fields of the abstract class before the instantiation of a child class takes place. It is important to have a destructor to delete the memory allocated for the class.

This means that although perhaps not best practice an abstract class can have data members just like any other class. In c an abstract class is just a class with one or more methods which are pure virtual members. This is true for all classes and it also applies to an abstract class. An abstract class can have constructor similar to normal class implementation.

Yes an abstract class can have a constructor even though abstract class cannot be instantiated. Yes an abstract class can have a constructor in java. But next question can also be arises as if we cannot instantiate construct object using new an abstract class then what for an constructor is in an abstract class or why should we use a constructor in abstract class. The constructor is always used to initiate a class or use it to create an object of the class.

You can also provide a constructor to abstract class explicitly. You can either explicitly provide a constructor to abstract class or if you dont the compiler will add default constructor of no argument in abstract class. Lets see an example. The compiler automatically adds the default constructor in every class either it is an abstract class or concrete class.

Of course abstract class can have a constructorgenerally class constructor is used to initialise fieldsso an abstract class constructor is used to initialise fields of the abstract class. In the case of the destructor we can declare a pure virtual destructor. Yes we can define parameterized constructor in abstract class. Data members can only be constructed at invocation of the classs constructor meaning not only that abstract classes can have constructors in c but it means that all abstract classes in c do have constructors except where no explicit constructor is specified and.