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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.
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...
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...
The Java leg of our trip. Started from Jakarta to Yogyakarta by train, to Mt. Bromo and from there to Surabaya
theses cute little birds were living in the decreative holes on the house we stayed in and liked to perch in the angel's trumpet bush/tree
The Java leg of our trip. Started from Jakarta to Yogyakarta by train, to Mt. Bromo and from there to Surabaya
A raingarden/bioretention strip was constructed in the parking lot of the Port City Java corporate headquarters. The bioretention area divided into two cells. The first cell is approximately 585 square feet and cell 2 is approximately 590 square feet. Each cell is 5 feet wide and approximately 1 foot deep. The two cells together drain approximately 15,000 square feet of parking lot. The cells are vegetated with a zoyzia grass cover and planted with Dwarf Wax Myrtle. The bioretention system was installed for approximately $33,000. Underdrains were installed in both cells of the bioretention area. Monitoring of the parking lot runoff and the exfiltrate through the underdrains will determine the effects of the bioretention area on water quality. (Perrin, et al., 2008).