Can you have a constructor in abstract class?
- 18 Answers
- 51684 Views
- HCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / saurabh
public class xyz : abc
{
int r = 10;
public xyz()
{
r = 35;
}
}
public abstract class abc
{
public int i = 0;
public abc()
{
i = 10;
}
}
sure , we can create constructor in abstract class.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / sadiq
Yes. Abstract class can have constructor.
But abstract class cannot be instantiated,how we can call
constructor? Using super()(calls super class constructor) in
the subclass which extends abstract class.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / suresh
any class which extends with an object class should have a
constructor whether a class is abstract class or not.
if a abstract class is super class to some sub classes,
then the abstract class should extneds with oject class.
EX: abstract class A{
A{
super(); /// it ll give a call to super class
/// super() we can use only in
constructor
}
}
class B extends A{
}
means any class should extnd with super class.
because of this abstract classes are not 100% abstract.
interface is 100% abstract.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / swapnil bhosale
ya ,we can define and call costructor in abstract class but just by using super keyword in base class ,but keep in mind we cannot create instance ob abstract class,this just another way to call contructor in abstract class,go run and see o/p
import java.io.*;
abstract class A
{
A()
{
System.out.println("hi am conS in absT");
}
}
class AA extends A
{
AA()
{
super();//calling abstract constructor
System.out.println("hi i am conS in sub class ");
}
}
class AbstConst2
{
public static void main(String arg[])
{
AA ob=new AA();//creating instance of base class consT
}
}
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / vivek
Yes you can have only non parameterized constructor in
abstract class, Because for parameterized constructor we
will have to make instance of abstract class which is not
possible.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / neelamadhab mallick
A Abstract class never can be instanciate. if a concrete
method present inside the abstract class with the return
type of the same class, then it is possible to create the
object, but constructor will not called.
| Is This Answer Correct ? | 11 Yes | 22 No |
Answer / ashokmail.java@gmail.com
No. you can't make instance of abstract class.
| Is This Answer Correct ? | 42 Yes | 62 No |
Answer / naveen
a abstract class can contain abstract methods and concrete methods, to initiate and use these method we can create the object and also a constructor
| Is This Answer Correct ? | 7 Yes | 27 No |
Explain java coding standards for constants?
What is the use of put method?
Can interface be private in java?
what are different ways in which a thread can enter the waiting state? : Java thread
Can array grow dynamically in java?
What is java ceil?
What is meant by Session? Explain something about HTTP Session Class?
How objects are stored in java?
Can we print null in java?
Explain aggregation in java?
what is difference between abstract and interface? can i give real time example for the two topics?
What is null statement?
Core Java 
