PPT-Inheritance and Method Overriding

อาจารยสมเกยรต ชอ เหมอน สาขาวชาวศวกรรมซอฟตแวร คณะวทยาศาสตรและ. . Inheritance and . Polymorphism. CSE . 459.24. Prof. . Roger Crawfis. C# Classes. Classes are used to accomplish:. Modularity: Scope for global (. static) . methods. Blueprints . for generating . objects or instances:. Remember . inheritance. : when a child class inherits methods, variables, . etc. from a parent class.. Example: . public class Dictionary extends Book. Open . Book, Dictionary, . InheritanceClient. Java Unit 11: Inheritance I. Both instance variables and methods are inherited. In a program that uses an instance of a subclass, it is possible to work with the object’s instance variables by using the corresponding get and set methods, which are also inherited from the superclass. . . Inheritance and . Polymorphism. CSE . 459.24. Prof. . Roger Crawfis. C# Classes. Classes are used to accomplish:. Modularity: Scope for global (. static) . methods. Blueprints . for generating . objects or instances:. CMPS 2143. Overriding. Recall, a method in a child class . overrides. a method in the parent class, . if it has the same name and type signature.. Also . known as . inclusion polymorphism. important when combined with substitution. Zone Observatory. Big . Geodynamics. -Related Science Questions . Magali Billen. Department of Earth & Planetary Sciences. UC Davis. Collaborators & Students: Ana . Negredo. -Moreno, Juan Rodriguez-Gonzalez (PD), Katrina Arredondo (GS), John . CS 2302 Spring 2015. Constructor Chaining. We can simplify the constructors in . Circle. and . Rectangle. by . chaining. constructors. The constructor in a superclass can be called from the constructor in a subclass. CMPS 2143. Inheritance. Heart of concept of inheritance is the . is-a. relationship. But in the real world, objects classified in multiple, mutually non-overlapping ways.. spork. is a fork and a . Superclasses. , Subclasses. Inheritance. Allows for more usability of code. Page 168 of Heads First book. Class – . SuperHero. (Classes) Suits; tights; . specialPower. (Methods) . useSpecialPower. ; . 1. Overriding Methods. A child class can . override. the definition of an inherited method in favor of its own. The new method must have the same signature as the parent's method, but can have a different body. Fundamental Concepts. Svetlin Nakov. Telerik Corporation. www.telerik.com. Contents. Fundamental Principles of OOP. Inheritance. Abstraction. Encapsulation. Polymorphism. Cohesion and Coupling. 2. Fundamental Principles . Mechanism for enhancing existing classes. You need to implement a new class. You have an existing class that represents a more general concept is already available.. New class can inherit from the existing class.. Like father, like son. Objectives. 2. Introducing inheritance through creating subclasses. Improve code reusability. Allowing overriding to replace the implementation of an inherited method. [CS1020 Lecture . Inheritance. Template Method Pattern. Factory Method Pattern. 2. Class Reuse. Two forms of class reuse:. Class implementation inheritance. “extends” in Java. Different than “implements”, which is “interface inheritance”.