Giới thiệu tài liệu
Lecture on Object-Oriented Programming: Lesson 6 - Inheritance and Composition is a written document designed to help students understand the concept of code reuse, explain its principles, especially inheritance and composition. The lecture explains the principles of inheritance and their order of execution, object creation and destruction during inheritance, and applies code reuse techniques and principles on the Java programming language. This material also shares ways to reuse existing classes, including copying an old class into a new one, creating a new class by combining objects of an existing class (composition), and inheriting from an existing class (inheritance). The lecture discusses the advantages of code reuse such as reduced development costs, lowered expenses, improved software quality, better maintainability, and easier testability.
Đối tượng sử dụng
Sinh viên lập trình hướng đối tượng, các nhà nghiên cứu và các doanh nghiệp sử dụng ngôn ngữ lập trình Java.
Nội dung tóm tắt
The lecture on Object-Oriented Programming: Lesson 6 - Inheritance and Composition is designed to help students grasp the concept of code reuse. The lecture explains that code reuse can reduce development costs, lower expenses, improve software quality, and increase maintainability and testability. To achieve this, the lecture discusses three methods for reusing existing classes: copying an old class into a new one, creating a new class by combining objects of an existing class (composition), and inheriting from an existing class (inheritance). The lecture also explains the principles of inheritance and their order of execution, object creation and destruction during inheritance. The lecture provides UML diagrams to illustrate composition and offers examples in Java, such as a Triangle created from Point objects. The lecture concludes with an explanation of the order of initialization in composition and emphasizes that each new object's properties must be initialized and assigned appropriate values.
