Object-oriented programming (OOP) is a software programming. It design’s a program using classes and objects. This model divides data into objects (data fields). It describes object contents and behavior through the declaration of classes (methods). Java training institutes in Kukatpally.
OOP features & Java training institutes in Kukatpally
- Encapsulation: This makes the program structure easier to manage. Here each object’s implementation and state hidden behind well-defined boundaries.
- Polymorphism: This means abstract methods implemented in many ways.
- Inheritance: This refers to hierarchical arrangement of fragment implementation.
Object-oriented programming allows programming in simplified manner. It has benefits that include reusability, refactoring, extensibility, maintenance and efficiency. Java training institutes in Kphb.
Popular languages in OOP’s include languages of C-family,Java and Python.
So “pure” OOP languages include Ruby, Eiffel, Scala, Emerald and Smalltalk.
Inheritance is a process where one object acquires the properties of another object. With the use of inheritance the information is managed in a hierarchical order. Java training in kukatpally.
The keywords extend and implements are used in case of inheritance. These words determine whether one object is IS-A type of another or not. By using these keywords we can make one object acquire the properties of another object.
Abstraction refers the ability to make a class abstract in OOP. All other functionalities of the class exist. If its methods, fields and constructors are all accessed in the same manner. You just cannot create an instance of the abstract class. Java training in Hyderabad Kukatpally.
If a class is abstract and it cannot be instantiated. A parent class contains the same functionality of child classes, but the parent class itself is abstract to use on its own.
Polymorphism is the ability of an object to take on many forms. The common use of polymorphism in OOP is parent class reference refers to a child class object. Java training institutes in Kukatpally.
It is important to know that only possible way to access an object is through reference variable. A reference variable can be of only one type. Once declared, the type of a reference variable cannot change.
The reference variable can reassigned to other objects. The type of the reference variable would determine the methods that can invoke the object.
A reference variable can refer to any object of its declared type or any subtype of its declared type. A reference variable can be a class or interface type. Java training institutes in Kphb.