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Lec 1.1 Object Oriented Programming
- 2. Course Introduction •Prerequisites •Programming Fundamentals •Course Objective •This course aims to develop students’ Objects oriented programming skills. [email protected]
- 3. Course Introduction •Textbook •Java Programming From the Ground Up by Ralph Bravaco and Shai Simonson, McGraw-Hill Higher Education New York, 2010, ISBN: 978-0-07-352335-4 •Ivor Horton’s Beginning Java by Ivor Horton, John Wiley & Sons, Inc. 7th Edition, 2011, ISBN: 978-0-470- 40414-0 [email protected]
- 4. Course Introduction •Reference Material •Java TM Programming by Joycee Farrell,6th Edition, Cengage Learning, 2012, ISBN-13: 978-1-111- 52944-4 •Java TM How to Program By Paul Deitel and Harvery Deitel, Pearson,9th Edition, 2012, ISBN-13: 978-0- 13-257566-9 [email protected]
- 5. Course Overview • Objects and Classes, Abstraction Encapsulation • Final Classes, Nested and Inner Classes • Inheritance, Abstract Classes, Concrete Classes, Inheritance and Encapsulation • The is-a Relationship, Inheritance via Abstract Classes, Extending the Hierarchy, Upcasting and Downcasting, Interfaces [email protected]
- 6. Course Overview • Composition, has-a Relationship • Polymorphism • Dynamic Binding • Interfaces and Polymorphism [email protected]
- 7. Course Overview •The Wrapper Classes, Boxing and Unboxing Packages •Exceptions and Exception Handling •File System and paths, File Directory Handling and Manipulation, Input/Output Streams, Reading Binary Data, Writing Binary Data, Writing Text, reading text, Logging with PrintStream, Random Access Files, Serialization •Collection for-each Loop [email protected]
- 8. Course Overview • GUI Concepts, Components and Containers, Abstract Windows Toolkit and Swing, Windows and Frames, Layout Managers, Panels • Event-Driven Programming, The Delegation Event Model • Event Classes, Mouse Events, Keyboard Events, Using Actions • Component and Jcomponent, Buttons, Labels, Text Fields, Text Areas, Dialog Boxes, Checkboxes, and Radio Buttons, Menus, Jslider, JTabbedPane [email protected]
- 9. What is OOP • Object-oriented programming (OOP) is a programming language model organized around objects rather than "actions" and data rather than logic. • Historically, a program has been viewed as a logical procedure that • takes input data • processes it • produces output data. • The programming challenge was seen as how to write the logic, not how to define the data. [email protected]
- 10. What is OOP • Object-oriented programming takes the view that what we really care about are the objects we want to manipulate rather than the logic required to manipulate them. • Example • Human Being • Name • Height • Age • Gender • Race • etc [email protected]
- 11. What is OOP •Object Oriented Programming is an engineering approach for building software systems •Based on the concepts of •Classes •Objects That are used for modeling the real world entities. [email protected]
- 12. Why OOP •Better suited for team development •Facilitate utilizing and creating reusable components. •Easier GUI Programming •Easier Software maintenance [email protected]
- 14. About • Simula is considered as the first object-oriented programming language. The programming paradigm where everything is represented as an object, is known as truly object-oriented programming language. [email protected]
- 15. OOP • Object means a real word entity such as pen, chair, table etc. Object- Oriented Programming is a methodology or paradigm to design a program using classes and objects. It simplifies the software development and maintenance by providing some concepts: • Object • Class • Inheritance • Polymorphism • Abstraction • Encapsulation [email protected]
- 16. Object: Any entity that has state and behavior is known as an object. For example: chair, pen, table, keyboard, bike etc. It can be physical and logical. [email protected]
- 17. • Syntax to declare a class: •Class • Collection of objects is called class. It is a logical entity. [email protected]
- 18. Simple Example of Object and Class • In this example, we have created a Student class that have two data members id and name. We are creating the object of the Student class by new keyword and printing the objects value. [email protected]
- 21. •Polymorphism • When one task is performed by different ways i.e. known as polymorphism. For example: to convince the customer differently, to draw something e.g. shape or rectangle etc. • In java, we use method overloading and method overriding to achieve polymorphism. • Another example can be to speak something e.g. cat speaks meaw, dog barks woof etc. •Inheritance • When one object acquires all the properties and behaviors of parent object i.e. known as inheritance. It provides code reusability. It is used to achieve runtime polymorphism. [email protected]
- 23. • Abstraction • Hiding internal details and showing functionality is known as abstraction. For example: phone call, we don't know the internal processing. • In java, we use abstract class and interface to achieve abstraction. •Encapsulation • Binding (or wrapping) code and data together into a single unit is known as encapsulation. For example: capsule, it is wrapped with different medicines. • A java class is the example of encapsulation. Java bean is the fully encapsulated class because all the data members are private here. [email protected]
- 25. Advantage of OOPs over Procedure- oriented programming language • OOPs makes development and maintenance easier where as in Procedure-oriented programming language it is not easy to manage if code grows as project size grows. • OOPs provides data hiding whereas in Procedure-oriented programming language a global data can be accessed from anywhere. • OOPs provides ability to simulate real-world event much more effectively. We can provide the solution of real word problem if we are using the Object-Oriented Programming language. [email protected]
- 27. •What is difference between object-oriented programming language and object-based programming language? • Object based programming language follows all the features of OOPs except Inheritance. JavaScript and VBScript are examples of object based programming languages. [email protected]