Object-Oriented Programming using Java
Chapter 1 – Introduction to Objects
OBJECT-ORIENTED PROGRAMMING (OOP) represents an attempt to make programs more closely model the way people think about and deal with the world. In the older styles of programming, a programmer who is faced with some problem must identify a computing task that needs to be performed in order to solve the problem. Programming then consists of finding a sequence of instructions that will accomplish that task. But at the heart of object-oriented programming, instead of tasks we find objects – entities that have behaviors, that hold information, and that can interact with one another. Programming consists of designing a set of objects that model the problem at hand. Software objects in the program can represent real or abstract entities in the problem domain. This is supposed to make the design of the program more natural and hence easier to get right and easier to understand.
An object-oriented programming language such as JAVA includes a number of features that make it very different from a standard language. In order to make effective use of those features, you have to “orient” your thinking correctly.
1.1 What is Object Oriented Programming?
OBJECT-ORIENTATION 1 is a set of tools and methods that enable software engineers to build reliable, user friendly, maintainable, well documented, reusable software systems that fulfills the requirements of its users. It is claimed that object-orientation provides software developers with new mind tools to use in solving a wide variety of problems. Object-orientation provides a new view of computation. A software system is seen as a community of objects that cooperate with with each other by passing messages in solving a problem.
An object-oriented programming laguage provides support for the following objectoriented concepts:
- Objects and Classes
- Inheritance
- Polymophism and Dynamic binding
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