Oops basics pdf

Oops basics pdf

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•Top-down: Stepwise program refinement •Bottom-up: Focus on the stable data parts then add methods •Object-oriented programming is bottom-up. Interact with objects through methods Contents. If you are new to object oriented approach for software development, An object in OOP has some state and behavior Lifetime of an Object. the implementation OOP: IntroductionStructuring by Program or Data? Finally, you will explore the most important concepts in object-oriented programming: encapsulation, data hiding, messages, and inheritance Object-Oriented Programming (OOP) consist of some important concepts namely Encapsulation, Polymorphism, Inheritance and Abstraction. Interact with objects through methods Access and modify object data. ChapterIntroduction Abstraction OOP: IntroductionThe Class Concept •A class is a collection of objects (or values) and a corresponding set of methods. Programs are Philosophy of OOP Object Oriented Programming is based on the idea of instantiating objects that are of a certain class A class describes a set of objects that have the same behavior For example, all objects of the Scanner class all behave the same way In the following code: Scanner scan = new Scanner(); you will walk through object-oriented programming by example; learning to use a simple object, examining the definition, extending the definition, and then designing your own object. Cleanup. Allocate enough memory to store object data/state. Distinguish between interface and its behavior vs. Set an initial object state. Allocation. Make sure that everything is in order before deletion Set an initial object state. •A class encapsulates the data representation and makes Four key concepts of OOP. Abstractionresponsibilities (interface) is different from implementation. •What are the actions of the program vs. Allocation. Philosophy of OOP Object Oriented Programming is based on the idea of instantiating objects that are of a certain class A class describes a set of objects that have the same Lifetime of an Object. Initialization. Usage. Initialization. These features are generally referred to as the OOPS concepts. which data does the program act on. Usage. Allocate enough memory to store object data/state.

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