PPT-Extract Subclass, Extract Superclass and Extract Hierarchy

By Ryan Meyer Extract Subclass When to Extract Subclass Class has methods variables which are used only in certain cases Hints Boolean flags Some fields are left null0 Frequent if statements in get methods. Subclass JN Political institutions an d public administration Europe Subclass JQ Political institutions and pu blic administration Asia Africa Australia Pacific Area etc Subclass JS Local government Municipal government Subclass JV Colonies and colo Subclass JN Political institutions an d public administration Europe Subclass JQ Political institutions and pu blic administration Asia Africa Australia Pacific Area etc Subclass JS Local government Municipal government Subclass JV Colonies and colo Put the following people in order of responsibility in the school:. Head Teacher. Deputy Head Teacher. Pastoral Team Leader. Students. Teacher. Today we are learning about…. By the end of the lesson…. 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. . 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. Superclasses. , Subclasses. Inheritance. Allows for more usability of code. Page 168 of Heads First book. Class – . SuperHero. (Classes) Suits; tights; . specialPower. (Methods) . useSpecialPower. ; . Daniel Liang , Introduction to Java Programming. Superclasses. and Subclasses. S. uperclass’s. Constructor. is not . Inherited. No. They are not inherited.. They are invoked explicitly or implicitly. . 1. Preconditions and Inheritance. precondition. what the method assumes to be true about the arguments passed to it. inheritance (is-a). a subclass is supposed to be able to do everything its . superclasses. The Methods . toString. (), equals(), and clone(). 1. 14.1 . toString. (). 14.2 equals(). 14.3 What is Cloning?. 14.4 Handling and Throwing . Exceptions. Outline continued on next overhead. 2. 14.5 The clone() Method in the Object Class and the . 1. Enhanced-ER (EER) Model Concepts. Includes all modeling concepts of basic ER . Additional concepts: subclasses/. superclasses. , specialization/generalization, categories, attribute inheritance. 2. Motivations. Suppose you will define classes to model circles, rectangles, and triangles. These classes have many common features. What is the best way to design these classes so to avoid redundancy? The answer is to use inheritance. . CSSE 575: Session . 3, . Part . 3. Dealing with Generalization. Steve Chenoweth. Office Phone: (812) 877-8974. Cell: (937) 657-3885. Email: chenowet@rose-hulman.edu. From www.cartoonbank.com. Generalizing code tends to make it more amenable to change!. References to Classes and Subclasses in Programs and methods. Write Superclass before Subclass. The use and testing of subclasses does not differ greatly from the use and testing of any programmer written class. . Revised by T. A. Yang. Outline. 2. Introduction. Inheritance and polymorphism. Implementing polymorphism in Java:. Operator /method Overloading. Method Overriding. Abstract. and Concrete Classes. Interfaces.