Can Abstract Class have a Constructor?

0 votes
Constructors in abstract class-how can it be used and for what purposes?
May 11, 2018 in Java by Daisy
• 8,050 points
83 views

1 answer to this question.

0 votes

Yes, an abstract class can have a constructor. Since an abstract class can have variables of all access modifiers, they have to be initialized to default values, so constructor is necessary. As you instantiate the child class, constructor of abstract class is invoked and variables are initialized.

On the contrary, an interface does contain only constant variables means they are already initialized. Thus, an interface does not need a constructor

answered May 11, 2018 by sharth
• 3,330 points

Related Questions In Java

0 votes
1 answer

Is there a way to instantiate abstract class ?

No, you are not creating the instance ...READ MORE

answered Dec 12, 2018 in Java by Sushmita
• 6,880 points
275 views
0 votes
1 answer

How can a war file be deployed in Tomcat 7?

You can access your application from: http://localhost:8080/sample Deploying ...READ MORE

answered Apr 20, 2018 in Java by sophia
• 1,400 points
541 views
0 votes
2 answers

How can I invoke a method when the method name is in the form of a given string?

You could probably use method invocation from reflection: Class<?> ...READ MORE

answered Aug 19 in Java by Sirajul
• 29,660 points
62 views
0 votes
1 answer

How can I read a large text file line by line using Java?

// Open the file FileInputStream file = new ...READ MORE

answered May 2, 2018 in Java by parth295
• 4,640 points
50 views
0 votes
2 answers

How to call one constructor from another in Java?

public class Cons { public static Cons ...READ MORE

answered Jul 24, 2018 in Java by Akrati
• 3,150 points
181 views
0 votes
1 answer

How to set a timer in Java?

To work on timer in java, you ...READ MORE

answered May 16, 2018 in Java by Daisy
• 8,050 points
52 views
0 votes
2 answers

When and how to use Super() keyword in Java?

super() is used to call immediate parent. super() can be ...READ MORE

answered Jul 9, 2018 in Java by Sushmita
• 6,880 points
109 views
0 votes
1 answer

Use of Static Keyword in a Class

It means that there is only one ...READ MORE

answered May 28, 2018 in Java by Rishabh
• 3,540 points
59 views
0 votes
2 answers

How can I convert a String variable to a primitive int in Java

 Here are two ways illustrating this: Integer x ...READ MORE

answered Aug 20 in Java by Sirajul
• 29,660 points
163 views
0 votes
1 answer

what are the ways in which a list can be iterated

  There are 5 ways to iterate over ...READ MORE

answered Apr 23, 2018 in Java by sharth
• 3,330 points
53 views