Thinking Object-Oriented
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This document discusses object-oriented programming (OOP) and its main concepts. It explains that OOP views a program as a collection of objects that communicate by sending and receiving messages. All objects are instances of classes that define their behavior and data. Computation is performed through objects simulating real-world entities and interacting with each other. The key benefits of OOP include scalability, code reuse through libraries, and providing abstractions that map to how people solve problems.
Thinking Object-Oriented
- 1. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References THINKING OBJECT-ORIENTED Muhammad Adil Raja Roaming Researchers, Inc. cbnd April 7, 2015 Muhammad Adil Raja Thinking Object-Oriented
- 2. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References OUTLINE I 1 INTRODUCTION 2 WHY IS OOP POLULAR? 3 MAIN CONCEPTS 4 COMPUTATION AS SIMULATION 5 MORE IDEAS 6 REFERENCES Muhammad Adil Raja Thinking Object-Oriented
- 3. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References INTRODUCTION I What is OOP? A revolutionary idea. Unlike anything that has come in programming before. OOP is an evolutionary step. Based on the earlier programming abstractions. Muhammad Adil Raja Thinking Object-Oriented
- 4. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References WHY IS OOP POLULAR? I Scalability – from simplest of problems to the most complex. Provides and abstraction that resonates with techniques people use to solve problems in their daily lives. Libraries assist in code reusability. Addresses the software crisis. Our imaginations and the tasks we would like to solve with computers outstrips our abilities. A new paradigm. Structure for scientific revolutions. Muhammad Adil Raja Thinking Object-Oriented
- 5. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MAIN CONCEPTS I Everything is an object. Computation is performed by objects communicating with each other, requesting that other objects perform actions. Objects communicate by sending and receiving messages. A message is a request for action bundled with whatever arguments may be necessary to complete the task. Each object has its own memory, which consists of other objects. Muhammad Adil Raja Thinking Object-Oriented
- 6. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MAIN CONCEPTS II Every object is an instance of a class. A class simply represents a grouping of similar objects, such as integer or lists. Classes are organized into a singly rooted tree structure, called the inheritance hierarchy. Memory and behavior associated with instances of a class are automatically available. to any class associated with a descendant in this tree structure. Muhammad Adil Raja Thinking Object-Oriented
- 7. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References COMPUTATION AS SIMULATION I Your world-view is that everything in the universe can be seen as an object. Through messages you can get those objects to communicate with each other. As you design the various objects and their interplay with each other, a nice simulation of the phenomenon emerges. As you implement all the stuff together, you can run this simulation as a computation. Muhammad Adil Raja Thinking Object-Oriented
- 8. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MORE IDEAS I OOP is a new way of thinking about the process of decomposing problems and developing programming solutions. OOP is not simply a few new features added to programming languages. OOP views a program as a collection of loosely connected agents, termed objects. Each object is responsible for specific tasks. It is by the interaction of objects that computation proceeds. In a certain sense, therefore, programming is nothing more or less than the simulation of a model universe. Muhammad Adil Raja Thinking Object-Oriented
- 9. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MORE IDEAS II An object is an encapsulation of state (data values) and behavior (operations). So an object is in many ways similar to a special purpose computer. The behavior of objects is dictated by the object class. Every object is an instance of some class. All instances of the same class will behave in a similar fashion. This means that they would invoke the same method in response to a similar request. An object will exhibit its behavior by invoking a method (similar to executing a procedure) in response to a message. Muhammad Adil Raja Thinking Object-Oriented
- 10. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MORE IDEAS III The interpretation of the message (that is, the specific method used) is decided by the object and may differ from one class of objects to another. Classes can be linked to each other by means of the notion of inheritance. Using inheritance, classes are organized into a hierarchical inheritance tree. Data and behavior associated with classes higher in the tree can also be accessed and used by classes lower in the tree. Such classes are said to inherit their behavior from the parent classes. Designing an object oriented program is like organizing a community of individuals. Muhammad Adil Raja Thinking Object-Oriented
- 11. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MORE IDEAS IV Each member of the community is given certain responsibilities. The achievement of the goals for the community as a whole come about through the work of each member, and the interactions of members with each other. By reducing the interdependency among software components, object-oriented programming permits the development of reusable software systems. Such components can be created and tested as independent units, in isolation from other portions of a software application. Reusable software components permit the programmer to deal with problems on a higher level abstraction. Muhammad Adil Raja Thinking Object-Oriented
- 12. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References MORE IDEAS V We can define and manipulate objects simply in terms of the messages they understand and a description of the tasks they perform. We can do all of this by ignoring implementation details. Muhammad Adil Raja Thinking Object-Oriented
- 13. Thinking Object- Oriented Muhammad Adil Raja Introduction Why is OOP Polular? Main Concepts Computation as Simulation More Ideas References REFERENCES I An Introduction to Object Oriented Programming, Timothy Budd. Muhammad Adil Raja Thinking Object-Oriented