Introduction to oop using java
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The document provides an introduction to object-oriented programming (OOP) using Java, explaining its core concepts such as classes, objects, and different access specifiers. It highlights the benefits of OOP, including code reusability and maintainability, and outlines four key concepts: abstraction, encapsulation, inheritance, and polymorphism. Overall, it emphasizes that for a language to be classified as object-oriented, it must incorporate these fundamental principles.
Introduction to oop using java
- 1. OOP - JAVA Introduction to OOP using Java 4/6/2022 1 Department of Computer PRO – GRADE 5 Lecturer. OMEED M. M
- 2. Table of contents What is OOP? Classes and Objects Types of the access specifies List of OOP Concepts in Java 4/6/2022 2
- 3. What is OOP? OOP stand for Object-Oriented Programming Object-Oriented Programming is a methodology or paradigm to design a program using classes and objects. It simplifies software development and maintenance by providing some concepts. Languages used in Object Oriented Programming: Java, C++, C#, Python, PHP, JavaScript, Ruby, Perl, Objective-C, Dart, Swift, Scala 4/6/2022 3
- 4. Class and Object What are Classes and Objects? Classes and objects are the two main aspects of object-oriented programming. 4/6/2022 4
- 5. Class and Object Object Objects have states and behaviors. Example: A dog has states - color, name, breed as well as behaviors – wagging the tail, barking, eating. An object is an instance of a class. Everything is an object 4/6/2022 5
- 7. Class and Object Class - Collection of objects is called class. It is a logical entity. - A class can be defined as a template/blueprint that describes the behavior/state that the object of its type support. 4/6/2022 7
- 9. Types of the access specifies There 3 types of the access specifies 1. Public: accessible in all class in your application. 2. protected: accessible within the package in which it is defined and in its subclass(es)(including subclasses declared outside the package) 3. Private: accessible only within the class in which it is defined. 4/6/2022 9
- 10. List of OOP Concepts in Java 1. Abstraction 2. Encapsulation 3. Inheritance 4. Polymorphism 4/6/2022 10
- 11. Conclusion The main idea behind Object Oriented Programming is simplicity, code reusability, extendibility, and security. These are achieved through Encapsulation, abstraction, inheritance, and polymorphism. For a language to be classified as OOP, it must have these 4 OOP blocks 4/6/2022 11
- 12. Any Questions ? 4/6/2022 12