This way, you create simple as well as more complex objects through which you eliminate repetitive work. Most programs contain repetitive tasks and equations all over the programming code, and abstraction is the tool to create complexity via simplicity. Encapsulation provides you with a method to keep fields within a class private, enabling data protection across the application in the works.
Access to fields is ensured through public methods but only after the fields are encapsulated. Encapsulation allows for re-using code components and variables without compromising the code security. Inheriting attributes of existing classes is the main idea behind the inheritance concept. You create new classes and they simply get some attributes from the ones created previously, thus enabling developers to speed up work on Java websites and applications.
Inheritance is also useful when you need to extend your current code to cover different use case scenarios. Polymorphism is actually a very simple programming concept despite its weird name. It is a method for Java developers to make use of the same word in different contexts by applying a different meaning to it.
The two basic methods to take advantage of polymorphism are method overloading and method overriding. In the first case, the very code implies different meanings to the word and do so in context. The method overriding concept allows variables to imply different word meanings through the variable values.
All of the above methods work best when the DRY concept is applied. By creating a method, you replace identical blocks with one method, to be used for different purposes across the code. According to Mr. John Barnett, project coordinator at Iflexion , a web development company,.
What are packages? Simply put, packages are groups of similar classes that you keep together. They are created through a single command in Java and provide an additional layer of security. You can import packages into your program, but you can also restrict access to classes from other packages. An object is the instance of the class. We can define a class by using the class keyword. Object: An object is a real-world entity that can be identified distinctly.
For example, a desk, a circle can be considered as objects. An object has a unique behavior, identity, and state. Data fields with their current values represent the state of an object also known as its properties or attributes.
Abstraction: An abstraction is a method of hiding irrelevant information from the user. For example, the driver only knows how to drive a car; there is no need to know how does the car run. We can make a class abstract by using the keyword abstract. In Java, we use abstract class and interface to achieve abstraction. Encapsulation: An encapsulation is the process of binding data and functions into a single unit.
A class is an example of encapsulation. In Java, Java bean is a fully encapsulated class. Inheritance: Inheritance is the mechanism in which one class acquire all the features of another class.
We can achieve inheritance by using the extends keyword. It facilitates the reusability of the code. Polymorphism: The polymorphism is the ability to appear in many forms.
In other words, single action in different ways. For example, a boy in the classroom behaves like a student, in house behaves like a son. There are two types of polymorphism: run time polymorphism and compile-time polymorphism. JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week. Java Main Method System. JavaScript Java vs.
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