{myadvertisements[zone_1]}
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
What’s an abstract class?
#1
A class that cannot be instantiated. An abstract class is a class that must be inherited and have the methods overridden. An abstract class is essentially a blueprint for a class without any implementation
Reply
{myadvertisements[zone_3]}
#2
An abstract class is a class that is declared abstract—it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed. An abstract method is a method that is declared without an implementation (without braces, and followed by a semicolon). When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class. However, if it does not then the subclass must also be declared abstract.
Reply
{myadvertisements[zone_3]}
#3
Abstract classes are used for defining a template. Their power comes in their ability to separate library code from the users of the library code. This is especially useful for large teams.


Online Shopping for Women
Reply
{myadvertisements[zone_3]}
#4
What is an Abstract Class?”

This is very basic Java Interview Question. Probably the 1st Java Interview Question you get during interview.

Let’s start understanding Abstract class first and then we will go over Example.

What is an Abstract Class?

An abstract class is a class that is declared abstract
Abstract classes cannot be instantiated
Abstract classes can be subclassed
It may or may not include abstract methods
When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class
If subclass doesn’t provide implementations then the subclass must also be declared abstract.
Can I define an abstract class without adding an abstract method?

Of course yes. Declaring a class abstract only means that you don’t allow it to be instantiated on its own. You can’t have an abstract method in a non-abstract class.

What is an Abstract Method?

An abstract method is a method that is declared without an implementation
It just has a method signature
Let’s start with an Example. Problem Description:

Create class CrunchifyExam.java, which has one abstract method called checkResult()
Create class Crunchify1stSchoolExamResult.java, which extends Abstract class CrunchifyExam.java
Create class Crunchify2stSchoolExamResult.java, which extends Abstract class CrunchifyExam.java
Now both above classes have to provide implementation for checkResult() method
Both Schools may have their own different procedure or number of checks to find out if user is PASSED or FAILED, they are free to have their own implementation of checkResult()
Convertifire Review -  Auto feedback
Serplify Pro Review - Optomize your onpage
Reply
{myadvertisements[zone_3]}
#5
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods
Reply
{myadvertisements[zone_3]}
#6
Abstract classes are classes that contain one or more abstract methods.An abstract method is a method that is declared, but contains no implementation.Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Reply
{myadvertisements[zone_3]}
#7
Abstract Class good for define a template
Reply
{myadvertisements[zone_3]}
#8
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Reply
{myadvertisements[zone_3]}
#9
Abstract classes are used for defining a template. Their power comes in their ability to separate library code from the users of the library code. This is especially useful for large teams.
Reply
{myadvertisements[zone_3]}
#10
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.

===============

Food franchise India | Chaat Franchise | Food stall Ideas | Street Foods Franchise
Reply
{myadvertisements[zone_3]}
#11
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.

=================

Franchise Consultants | Foods franchise | Retails franchise | Channel Partner India
Reply
{myadvertisements[zone_3]}
#12
An abstract class is a class that is declared abstract —it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.
Reply
{myadvertisements[zone_3]}
#13
Thanks for sharing. I like this
IELTS Classes in Moga
Reply
{myadvertisements[zone_3]}


Possibly Related Threads...
Thread Author Replies Views Last Post
  What is a Singleton Class? being.chinmay 3 83 12-08-2016, 08:33 PM
Last Post: jackar56
  Get World-class Web Projects With Drupal Cms And Meet Your Business Goals minddigital10 0 45 08-09-2016, 11:17 PM
Last Post: minddigital10
  What’s the difference between the Debug class and Trace class? being.chinmay 5 358 03-31-2016, 12:21 AM
Last Post: Sandy Martin

Forum Jump:


Users browsing this thread: 1 Guest(s)
{myadvertisements[zone_2]}