Question

I have an abstract constructor and a derived class like follows:

abstract ab {
  ab();
}

class dc {
  dc();
}

I want to execute first the constructor of the derived class and then execute the constructor of the abstract class

Please give me an example.

Answer 1

My suggestion would be to use composition over inheritance.

Class SuperClass {
  AbstractClass abstractClass;

  public SuperClass() {
    doStuff();

    abstractClass = new ConcreteClass();
  }
}

This links gives more explanation http://tiedyedfreaks.org/eric/CompositionVsInheritance.html