Some questions about abstract class with private, public and protected constructors

Question

My first question: What is the difference between an protected and a public constructor in an abstract class?

My second questions: Does it make sense, if the abstract cl

Answer 1

Question #1: Not much. You can't call the constructor of an abstract class (instantiate it) directly anyway. You could only call one from a subclass, which means you'd definitely have access to protected members as well as public members at that point.

Question #2: No, not much sense. A private constructor on an abstract class could only be called by "constructor chaining" from a non-private constructor in the same class.