why abstract class will have a constructor?
Answers were Sorted based on User's Feedback
Answer / hari krishna
All the classes including the abstract classes can have
constructors.Abstract class constructors will be called
when its concrete subclass will be instantiated.
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / nitin panwar
Bcoz each subclass executes the superclass constructor
before executing own constructor,thats why abstract class
has a constructor .
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / aditya ganjiwale
Its there to be able to initialize the abstract class
internal state.
Lets say you would like to assign two variables, you would
have to do this for every implementation, but with
constructors in the abstract class you only need it once:
So every class inheriting only needs to call the
constructor, instead of assigning the values themself every
time.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / ram
Abstract class have the constructor in it just to instantiate its instance variables. Where as Interfaces are not containing any instance variables. That is why, they dont have constructor concept.
| Is This Answer Correct ? | 0 Yes | 0 No |
What is the purpose of the finally clause?
What is java regex?
What are different data structures in java?
How to make class immutable
Why is a singleton bad?
What are the different types of constructor?
Difference between the String and StringBuffer classes?
What is a singleton in genetics?
What are different exception types exceptions available in java ?
This is related to threads. I have a class with synchronized method m1(). Can I create different instances of this class and execute the m1() for different threads?
What are the common uses of "this" keyword in java ?
What are the major drawbacks of external iteration?