What is Abstraction

Abstraction in Java, which is one of the OOPs concepts, is the process of showing only the required information to the user by hiding other details. For example, consider a mobile phone, we just know that pressing on the call button, will dial the required number. But we actually don't know the actual implementation of how a call works. This is because the internal mechanism is not visible to us. This is a real example of abstraction. Similarly, abstraction works in the same way in Object-oriented programming. In this tutorial, we will learn how to achieve abstraction using Java abstract classes and methods.

Ways to achieve Java Abstraction

We can achieve abstraction in java by below 2 ways.

You can refer to Interface in Java tutorial to understand more about achieving abstraction using an interface.

Use of Abstraction

- Provides security by hiding implementation details.

- Provides flexibility for the subclass to implement the functionality of the inherited abstract method of the superclass.

Let's discuss in detail about Java abstract class and methods.

Abstract class in Java

When we declare a class with an abstract keyword, we call it an abstract class. abstract is a non-access modifier keyword that we can use along with a class and method. An abstract class is a special class that is a superclass that contains unimplemented methods. Hence the subclass that inherits the parent abstract class should implement all the abstract methods.

www.tutorialcup.com/java/abstraction-in-java.htm

Java Roast Handmade Soap by The Bath Factory

We went to Ambarawa Railway Museum, and had a ride on a Thomas the Tank Engine type little steam train, in 3rd-class carriages built in 1911. We chugged through paddy fields, surrounded by clouds of dragonflies, past cloud-wrapped volcanoes.

Mendut Temple

Java

Japanese art print by Mikiko Himei (active 2000s)

Cycling the Javanese countryside in Indonesia is a delight early mornings, when the temperature is not too high. The landscape is radiating all hues of green from rice paddies in the morning sun.

6th JUNE, LONDON – The London Java Community meet for a technical session by Ian Ashworth. Showing how development testing and static analysis will help developers find critical defects in code development and accelerate the time to market. See the SkillsCast (film, code, slides) at: skillsmatter.com/podcast/java-jee/java-development-testin...

some interesting ruins are near yogyakarta

aka Java Finch

Padda oryzivora or Lonchura oryzivora for what I found...

Moineau de Java

Java Boat

6th JUNE, LONDON – The London Java Community meet for a technical session by Ian Ashworth. Showing how development testing and static analysis will help developers find critical defects in code development and accelerate the time to market. See the SkillsCast (film, code, slides) at: skillsmatter.com/podcast/java-jee/java-development-testin...

Java 2016

Java Sparrow - Vishnu Temple, Prambanan

Java

These are fairly large scale, standing about 15 inches tall. I had the stones carved to match my large glass hurricanes.

Java

Indonésie

Java

Java Indonesia

Java Jazz 2013

java sparrows

Borobudur

Lee Ritenour with Patrice Rushen, William Kennedy, Melvin Davis

Piscine de l'hôtel Le Meridien Jakarta

Java - Juillet 2010

@ Java Jazz 2011