What is the need of abstract class?

Asked by Last Modified  

1 Answer

Learn Java +3 Java Script Training Java Programming Core Java

Follow 2
Answer

Please enter your answer

The classes which are defined with the abstract keyword are known as abstract classes. Abstact classes contain one or more abstract methods. An abstract method is declared but contains no implementation. It requires subclasses to provide implementations for the abstract methods. Abstraction is a feature...
read more
The classes which are defined with the abstract keyword are known as abstract classes. Abstact classes contain one or more abstract methods. An abstract method is declared but contains no implementation. It requires subclasses to provide implementations for the abstract methods. Abstraction is a feature in object-oriented programming languages like Java, where the implementation details are hidden. 'Abstract' keyword is used to create abstract classes and methods. Abstract classes in Java are similar to the interfaces, except that it can contain default method implementation. Abstract classes only tell the programmer what to do and not how to do it. Abstract classes are mainly required when we have to share some common operations between certain subclasses. They are primarily used for those sets of classes that are closely related to each other. For example, if you talk about shape, then it is abstract because the shape can be anything square, round, triangle etc. But when we say triangle shape, then it is specific. The primary purpose of using abstract classes is to enhance polymorphism feature. That means the code will work for any subclass of the abstract superclass. Abstract classes are used the same as super-classes EXCEPT that an Abstract class cannot be instanced itself, but only through classes that implement it. read less
Comments
Dislike Bookmark

Related Questions

What are different IDEs available to write programs?
There are many IDE for programming like TurboC++,Dev C++ for C and C++ programming. Eclipse,Notepad++,Dreamweaver for HTML,PHP,JAVA,ASP etc languages.
Meraj
0 0
5
If you want to Learn Technology of JAVA & .NET, It's better to start from the very beginning, 1. C 2. C++ 3. Data Structure 4. Core JAVA / VB.Net 5. Advance JAVA / Asp.Net "It's better to clear all the stages to achieve the Technology you want to Learn." Thanks & Regards, Prof. Jimmy Thakkar
yes you are right...... always build your building from base....so that you will be master
Jimmy
How do I show a popup message over a system tray icon/application in Java?
The java.awt.SystemTray class introduced in Java™ SE version 6 represents the system tray for a desktop. The system tray can be accessed by calling the static SystemTray.getSystemTray() method. Before...
Ajith
0 0
5
What is the difference between Java SE, ME, EE?
Java SE is Standard Edition of Java, also known as Core Java. Anybody who wants to work with Java must learn this. And, this is used to write stand alone software with Java. . Java ME is the Micro Edition...
Sense Softech
0 0
5
What is a complete list of topics of Core Java and topics of Advanced Java?
Core Java : Class ,Object,JVM,Thread,Interface,Exception,static ,Final . Advance Java : Collection,Collection Framework,JDBC,Servlet,Jsp
Chandramami
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Simple Input and Output in CoreJava
We can use any of the following options based on the requirements to accept data from the user in corejava and show them Integer Input Output Character Input Output Float Input Output INPUT AND...

Pravuram N.

2 0
0
Lambda Expressions in Java
A lambda expression, introduced in Java 8 is similar to a block of code resembling an anonymous function that can be passed to constructors or methods for execution as an argument. Examples: a)() ->...

Ashish Somvanshi

0 0
0
Comparable vs Comparator
java.lang.Comparable java.util.Comparator For comparing some other object with its own object. Ex. I am comparing myself to some other employee. Method signature is: int compareTo (T object). For...

Vivek R.

1 0
0
doWhile example in Java
public class doWhilePracticleEx { public void test() { } public static void main(String args) { String q1 = "Who is PM of India?"; String a1 = "Sonia Gandhi"; String a2 = "Rahul Gandhi"; String a3...
S

Sarthak C.

0 0
0
Difference Of Inheritance In C++ And Java
In Java , multiple inheritance is not applicable directly but we can implement the concept by using the interfaces. In c++ and Java, the common types of inheritances are: Single Multi level Hybrid Hierarchical

Saurabh Saxena

1 0
0

Recommended Articles

Why Java is the Most Popular Programming Language

Designed in a flexible and user-friendly demeanor, Java is the most commonly used programming language for the creation of web applications and platform. It allows developers to “write once, run anywhere” (WORA). It is general-purpose, a high-level programming language developed by Sun Microsystem. Initially known as an...

Read full article >

Java: An Object-Oriented Language

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Top 5 Reasons to Learn JavaScript

Before we start on the importance of learning JavaScript, let’s start with a short introduction on the topic. JavaScript is the most popular programming language in the world, precisely it is the language - for Computers, the Web, Servers, Smart Phone, Laptops, Mobiles, Tablets and more. And if you are a beginner or planning...

Read full article >

Some Popular IT Courses in Current Market

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Find Java Training Classes near you
Java Training Classes in Bangalore
Java Training Classes in Hyderabad
Java Training Classes in Pune
Java Training Classes in Chennai
Java Training Classes in Delhi
Java Training Classes in Mumbai
Java Training Classes in Kolkata
Java Training Classes in Noida
Java Training Classes in Gurgaon
Java Training Classes in Ghaziabad
Online Java Training

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you