![]() These objects have two things, state(attributes or properties or data) and behavior. The object oriented programming has following concepts and features :Īn object can be think of a real world entity, for example person, dog, chair bicycle, television etc are objects. Each object can change it's data and behavior as the user wants and it can also interact with other object through it's behaviors. Is given in form of methods(instance methods). The data of an object in a program is given using variable(instance variable) while behavior So in OOP, computer programs are basically a representation of object's data and behavior. Properties like name, age, height etc while behaviors like walk, talk, eat etc. The data of an object is basically the properties of that object while behavior is something, what that object does. This programming style says that, view everything as an object, be it you, your car, dog, chair, house, remote etc where each objects have it's own Oriented or based on the concept of objects. As the term object oriented programming itself suggests, writing programs in this style is Object oriented programming(OOP) is a programming paradigm or style of writing program. ➤ Overriding using Covariant Return Type.➤ Overloading and Overriding Differences.➤ Runtime and Compile-time Polymorphism.➤ Overflow Underflow Widening Narrowing.For example, if we want to drive a car, we does not need to know about the internal functionality like how wheel system works? how brake system works? how music system works? etc. In the abstraction concept, we do not show the actual implemention to the end user, instead we provide only esential things. AbstractionĪbstraction is hiding the internal details and showing only esential functionality. Method overriding - multiple methods with same name and same parameters. Method overloading - multiple methods with same name but different parameters. The java uses method overloading and method overriding to implement polymorphism. ![]() ![]() That means creating multiple methods with different behaviors. Polymorphism is the process of defining same method with different implementation. In java programming language the keyword extends is used to implement inheritance. In the inheritance, the properties and behaviors of base class extended to its derived class, but the base class never receive properties or behaviors from its derived class. The child class is also known as derived class or sub class. The parent class is also known as base class or supre class. In the inheritance concept, the class which provides properties is called as parent class and the class which recieves the properties is called as child class. Here, the new class acquires the properties and behaviors from the existing class. In inheritance, we derive a new class from the existing class. Inheritance is the process of acquiring properties and behaviors from one object to another object or one class to another class. The java programming language uses the class concept to implement encapsulation. In programming, data is defined as variables and code is defined as methods. In OOP, every object is associated with its data and code. EncapsulationĮncapsulation is the process of combining data and code into a single unit (object / class). The popular object-oriented programming languages are Smalltalk, C++, Java, PHP, C#, Python, etc. The object-oriented programming paradigm has the following core concepts. In other words, OOP is a way of writing programs based on the object concept. OOP is a programming paradigm in which every program is follows the concept of object. OOP stands for Object-Oriented Programming.
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