Content deleted Content added
→External links: remove spam |
|||
Line 15:
Object-oriented programming is an approach to designing modular reusable software systems. The object-oriented approach is an evolution of good design practices that go back to the very beginning of computer programming. Object-orientation is simply the logical extension of older techniques such as [[structured programming]] and [[abstract data types]]. An object is an abstract data type with the addition of [[polymorphism (computer science)|polymorphism]] and [[inheritance (object-oriented programming)|inheritance]].
Rather than structure programs as code and data, an object-oriented system integrates the two using the concept of an "object". An object has state (data) and behavior (code). Objects can correspond to things found in the real world. So for example, a graphics program will have objects such as ''circle'', ''square'', ''menu''. An online shopping system will have objects such as ''shopping cart, customer, product''. The shopping system will support behaviors such as ''place order'', ''make payment'', and ''offer discount''. The objects are designed as class hierarchies. So for example with the shopping system there might be high level classes such as ''electronics product'', ''kitchen product'', and ''book''. There may be further refinements for example under ''electronic products'': ''CD Player, DVD player'', etc. These classes and subclasses correspond to [[
==Specialized objects==
| |||