Java ppt on inheritance

Chapter 8 Inheritance 5 TH EDITION Lewis & Loftus java Software Solutions Foundations of Program Design © 2007 Pearson Addison-Wesley. All rights reserved.

the parent class, even if no object of the parent exists See FoodAnalyzer.java (page 460) // driver FoodAnalyzer.java See FoodItem.java (page 461) // parent FoodItem.java See Pizza.java (page 462) // child Pizza.java Outline Creating Subclasses Overriding Methods Class Hierarchies Inheritance and Visibility Designing for Inheritance Inheritance and GUIs The Timer Class Designing for Inheritance As weve discussed, taking the time to create a good software design reaps/


Chapter 9 – Inheritance Big Java by Cay Horstmann Copyright © 2009 by John Wiley & Sons. All rights reserved.

Implement the new addInterest method: public class SavingsAccount extends BankAccount { private double interestRate; public SavingsAccount(double rate) { interestRate = rate; } public void addInterest() { double interest = getBalance() * interestRate / 100; deposit(interest); } Inheritance Hierarchies Big Java by Cay Horstmann Copyright © 2009 by John Wiley & Sons. All rights reserved. A subclass has no access to private instance variables of its superclass Encapsulation: addInterest calls getBalance rather/


Chapter 8 Inheritance 5 TH EDITION Lewis & Loftus java Software Solutions Foundations of Program Design © 2007 Pearson Addison-Wesley. All rights reserved.

refer to the parent class, even if no object of the parent exists See FoodAnalyzer.java (page 460) FoodAnalyzer.java See FoodItem.java (page 461) FoodItem.java See Pizza.java (page 462) Pizza.java Outline Creating Subclasses Overriding Methods Class Hierarchies Inheritance and Visibility Designing for Inheritance Inheritance and GUIs The Timer Class Designing for Inheritance As weve discussed, taking the time to create a good software design reaps long/


Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Java Software Solutions Foundations of Program Design Sixth Edition by Lewis.

, and testing of the existing software Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 8-7 Deriving Subclasses In Java, we use the reserved word extends to establish an inheritance relationship See Words.java Words.java See Book.java Book.java See Dictionary.java Dictionary.java class Car extends Vehicle { // class contents } Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 8-8 The protected/


Inheritance Chapter 8 Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013.

); System.out.println("Number of pages: " + webster.getPages()); System.out.println("Number of definitions: " + webster.getDefinitions()); System.out.println("Definitions per page: " + webster.computeRatio()); } Using Constructors with Inheritance Slides based on Java Foundations 3rd Edition, Lewis/DePasquale/Chase 16 Scott Kristjanson – CMPT 125/126 – SFU Wk06.5 Slide 16 public class Book2 { protected int pages; //---------------------------------------------------------------- // Constructor: Sets up the/


Starting Out with Java: From Control Structures through Objects

from the GradedActivity class. FinaExam - numQuestions : int - pointsEach : double - numMissed : int + FinalExam(questions : int, missed : int) + getPointsEach() : double + getNumMissed() : int Example: GradedActivity.java, GradeDemo.java, FinalExam.java, FinalExamDemo.java Inheritance, Fields and Methods Members of the superclass that are marked private: are not inherited by the subclass, exist in memory when the object of the subclass is created may only be accessed from the subclass by/


 2005 Pearson Education, Inc. All rights reserved. 1 9 9 Object-Oriented Programming: Inheritance.

Pearson Education, Inc. All rights reserved. 11 9.4.1 Creating and Using a CommissionEmployee Class Class CommissionEmployee – Extends class Object Keyword extends Every class in Java extends an existing class – Except Object Every class inherits Object ’s methods New class implicitly extends Object – If it does not extend another class  2005 Pearson Education, Inc. All rights reserved. 12 Software Engineering Observation/


Improving structure with inheritance (Chapters 8 and 9)

theTitle, String theArtist, int tracks, int time) int tracks, int time) { super (theTitle, time); super (theTitle, time); artist = theArtist; artist = theArtist; numberOfTracks = tracks; numberOfTracks = tracks; }... methods... methods} Inheritance and constructors 20 Objects First with Java - A Practical Introduction using BlueJ, © David J. Barnes, Michael Kölling Superclass constructor call Subclass constructors must always contain a super call. Subclass constructors must always contain/


1 InheritanceInheritance allows a software developer to derive a new class from an existing one  The existing class is called the parent class, or.

hierarchy: StaffMember pay() ExecutiveHourly VolunteerEmployee Polymorphism via Inheritance  Now consider the task of paying all employees  See Firm.java (page 410) Firm.java  See Staff.java (page 412) Staff.java  See StaffMember.java (page 414) StaffMember.java  See Volunteer.java (page 415) Volunteer.java  See Employee.java (page 416) Employee.java  See Executive.java (page 417) Executive.java  See Hourly.java (page 418) Hourly.java public class Staff { private StaffMember[] staffList; // Pays/


JAVA: An Introduction to Problem Solving & Programming, 5 th Ed. By Walter Savitch and Frank Carrano. ISBN 0136130887 © 2008 Pearson Education, Inc., Upper.

Saddle River, NJ. All Rights Reserved Walter Savitch Frank M. Carrano Walter Savitch Frank M. Carrano Polymorphism and Inheritance Chapter 8 JAVA: An Introduction to Problem Solving & Programming, 5 th Ed. By Walter Savitch and Frank Carrano. ISBN 0136130887 /0136130887 © 2008 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved 20 UML Inheritance Diagrams Figure 8.2 A class hierarchy in UML notation JAVA: An Introduction to Problem Solving & Programming, 5 th Ed. By Walter Savitch and Frank/


CS 5JA Introduction to Java Objects You’ve heard the word “object-oriented” before. In general, it means thinking about a problem in terms of the objects.

avgHeight, double avgSpeed) { super(typeOfBird); this.avgHeight = avgHeight; this.avgSpeed = avgSpeed; } CS 5JA Introduction to Java Inheritance Now we can also have “base” methods we are automatically defined for all birds, but can also be overwritten by/ class Crow extends FlyingBird {... public void chirp() { //play ugly sounds of a crow... } CS 5JA Introduction to Java Inheritance These birds fly normally, so we won’t override the fly method public class Eagle extends FlyingBird {... public void chirp()/


Using UML, Patterns, and Java Object-Oriented Software Engineering Chapter 8, Object Design: Reuse and Patterns.

chill() dispenseItem() SodaMachine bagsofChips numberOfCandyBars dispenseItem() CandyMachine Bernd Bruegge & Allen H. Dutoit Object-Oriented Software Engineering: Using UML, Patterns, and Java 22 Meta-Model for Inheritance Inheritance Specification Inheritance Implementation Inheritance for Reuse Taxonomy Inheritance detected by generalization Inheritance detected by specialization Analysis activity Object Design Bernd Bruegge & Allen H. Dutoit Object-Oriented Software Engineering: Using UML, Patterns, and/


Liang, Introduction to Java Programming, Seventh Edition, (c) 2009 Pearson Education, Inc. All rights reserved. 0136012671 1 Chapter 11 Abstract Classes.

, Seventh Edition, (c) 2009 Pearson Education, Inc. All rights reserved. 0136012671 43 Discovering Class Relationships F Association F Aggregation and Composition F Dependency F Inheritance Liang, Introduction to Java Programming, Seventh Edition, (c) 2009 Pearson Education, Inc. All rights reserved. 0136012671 44 Association Association represents a general binary relationship that describes an activity between two classes. An association is /


Copyright © 2008 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Starting Out with Java: Early Objects Third Edition by Tony Gaddis Chapter.

Pearson Education, Inc. Publishing as Pearson Addison-Wesley 9-18 Overriding Superclass Methods Both overloading and overriding can take place in an inheritance relationship. Overriding can only take place in an inheritance relationship. Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java Copyright © 2008 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 9-19 Preventing a Method from Being Overridden The final modifier will/


M874 Java1 M874 Weekend School An Introduction to Java Programming.

int and a String M874 Java28 Presentation 2 Aims Describe the rationale behind OO languages. Show how an OO system consist of class hierarchies. Describe the main reuse facility within Java: inheritance. Describe the use of class (static methods). M874 Java29 The Notion of Hierarchy Plane CargoPlaneFighterPlane Passenger Plane B747B757AirbA320 M874 Java30 Hierarchy 1 Classes in a computer system can be arranged/


Copyright © 2012 Pearson Education, Inc. Chapter 9 Inheritance Java Software Solutions Foundations of Program Design Seventh Edition John Lewis William.

the effort that went into the design, implementation, and testing of the existing software Copyright © 2012 Pearson Education, Inc. Deriving Subclasses In Java, we use the reserved word extends to establish an inheritance relationship See Words.java See Book.java See Dictionary.java Copyright © 2012 Pearson Education, Inc. public class Car extends Vehicle { // class contents } The protected Modifier Visibility modifiers affect the way that class/


Sun Certified Java Programmer 1 © CPU, University of Limerick 2008 OBJECT ORIENTATION.

->displayShape(); shape->movePiece(); cout << endl; TilePiece *tile = new TilePiece(); tile->displayShape(); tile->getAdjacent(); } OUTPUT: displaying shape moving game piece displaying shape getting adjacent tiles Sun Certified Java Programmer 11 © CPU, University of Limerick 2008 Inheritance Inheritance allows your classes to be accessed POLYMORPHICALLY. From the previous example, the beautiful thing about polymorphism is that any subclass of GameShape can be treated as a/


Some Quick Reviews of Java. Background Java was developed in the early 90s by Sun Microsystems Java is a high-level language Java programs are portable.

std::string; class Employee { public: // constructor list // member functions private: string name, ssn; double netPay; }; class HourlyEmployee : public Employee { public: // constructor list // new member functions private: double wageRate; double hours; }; Java Inheritance How did we do that in C++ #include using std::string; class Employee { public: // constructor list // member functions private: string name, ssn; double netPay; }; class HourlyEmployee : public Employee { public: // constructor/


1 Java Dr. Yong Uk Song Dept. of MIS Yonsei University Wonju Campus.

(double value) { this.value = value; } public void set( ) { set(0.0); } public void print( ) { System.out.println(value); } 170 Session 12. Interface Multiple/Single Inheritance Limit of single inheritance Poor expressiveness Limit of multiple inheritance Complexity Ambiguity Java Single inheritance For simplicity Interface For expressiveness 171 172 Interface: Declarations Syntax public interface interface-name { constants methods } All methods in interfaces are automatically declared as public/


Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807 1 COS240 O-O Languages AUBG,

Pearson Education, Inc. All rights reserved. 0132130807 3 Discovering Class Relationships F Association F Aggregation and Composition F Dependency F Inheritance Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807 4 Association Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807 5 Association Association represents a general binary relationship/


Java and C++, The Difference An introduction Unit - 00.

(…){//…}} Inheritance Single Inheritance Single Inheritance Allowed in Java and C++ Allowed in Java and C++ Multiple Inheritance Multiple Inheritance Allowed only in C++ Allowed only in C++ Syntax Difference Syntax Difference Inheritance (contd) Single inheritance syntax in Java Single inheritance syntax in Java public class extends { } Single inheritance syntax in C++ Single inheritance syntax in C++ class : public { }; Inheritance (contd) No multiple inheritance in Java No multiple inheritance in Java/


 2005 Pearson Education, Inc. All rights reserved. 1 9 9 Object-Oriented Programming: Inheritance.

behaviors  2005 Pearson Education, Inc. All rights reserved. 3 9.1 Introduction (Cont.) Class hierarchy – Direct superclass Inherited explicitly (one level up hierarchy) – Indirect superclass Inherited two or more levels up hierarchy – Single inheritance Inherits from one superclass – Multiple inheritance Inherits from multiple superclasses – Java does not support multiple inheritance  2005 Pearson Education, Inc. All rights reserved. 4 9.2 Superclasses and subclasses Superclasses and subclasses – Object/


Object-Oriented Java Programming INE2720 Web Application Software Development Essential Materials.

(); s2.printLocation(); s3.printLocation(); s3.printLocation(); }} INE2720 – Web Application Software Development All copyrights reserved by C.C. Cheung 2003.56 Inheritance Example: Result Compiling and Running: Compiling and Running: javac SpeedboatTest.java –The above calls javac on Speedboat.java and Ship.java automatically java SpeedboatTest Output Output RED Speedboat1 is at (20,0). BLUE Speedboat2 is at (-1.41421,1.41421). Ship1 is at (-1/


Java-fall011.opennet Technologies Introduction to the Java Language and Object-oriented Concepts Fall Semester 2001 MW 5:00 pm - 6:20 pm CENTRAL (not Indiana)

for generic capabilities which apply to all Object classes  Strictly speaking, Object is the root of every inheritance diagram. java-fall0191 Methods on the Object class Public class Object { public final Class getClass() {... } // Basis / and retrieve().... }  Instances of the class acquire all the implemented interface types, in addition to inheriting their superclass type. java-fall01124 Interfaces can Extend other Interfaces  An interface can extend one or more other interfaces: interface Material/


JAVA, JAVA, JAVA Object-Oriented Problem Solving Ralph Morelli Trinity College Hartford, CT presentation slides for published by Prentice Hall Second Edition.

. All rights reserved. Chapter 4: Applets Technical Terms abstract class abstract interface abstract method applet Application Programming Interface (API) event-driven programming Graphical User Interface (GUI) import declaration inheritance inheritance hierarchy interface polymorphic method Java, Java, Java, 2E by R. Morelli Copyright 2002. All rights reserved. Chapter 4: Applets Summary Of Important Points An applet is an embedded program that runs within the context of/


Introduction to Java. Java characteristics Object-oriented Distributed Platform independent Secure Strongly typed.

verification: loaded class files satisfy byte code specification Run time access control: discretionary access control based on stack inspection, flexible security policy Java language Object-Oriented Programming Concepts Language basics Object basics and simple data objects Classes and inheritance Interfaces and packages Common problems/solutions OO programming concepts What Is an Object? An object is a software bundle of related variables and/


 2005 Pearson Education, Inc. All rights reserved. 1 9 9 Object-Oriented Programming: Inheritance.

子類別 繼承父類別 定義更明確 額外的功能 重複使用性  2005 Pearson Education, Inc. All rights reserved. 4 9.1 Introduction (Cont.) Class hierarchy – Direct superclass Inherited explicitly (one level up hierarchy) – Indirect superclass Inherited two or more levels up hierarchy – Single inheritance Inherits from one superclass – Multiple inheritance Inherits from multiple superclasses – Java does not support multiple inheritance 遺傳 隔代遺傳 Class A Class D Class BClass C Class E  2005 Pearson Education, Inc. All rights reserved. 5 9.2/


Big Java by Cay Horstmann Copyright © 2008 by John Wiley & Sons. All rights reserved. Inheritance.

{ private double balance; public double getBalance() {... } public void deposit(double amount) {... } public void withdraw(double amount) {... } } class SavingsAccount extends BankAccount { new methods new instance fields } An Introduction to Inheritance Continued Big Java by Cay Horstmann Copyright © 2008 by John Wiley & Sons. All rights reserved. Example: Savings account = bank account with interest public class SavingsAccount extends BankAccount { private double interestRate; public SavingsAccount(double/


Using UML, Patterns, and Java Object-Oriented Software Engineering Chapter 10, Mapping Models to Code.

are automatically updated when active value is changed (notification, data trigger) Bernd Bruegge & Allen H. Dutoit Object-Oriented Software Engineering: Using UML, Patterns, and Java 49 Increase Inheritance Rearrange and adjust classes and operations to prepare for inheritance Generalization: Finding the base class first, then the sub classes Specialization: Finding the the sub classes first, then the base class Generalization is a common/


Liang,Introduction to Java Programming,revised by Dai-kaiyu 1 Chapter 8 Inheritance and Polymorphism 一切皆有缘起.

instance initialization and static initialization blocks (§8.12 Optioanl). Liang,Introduction to Java Programming,revised by Dai-kaiyu 3 Introduction Object-oriented programming  Inheritance Software reusability Classes are created from existing ones Absorbing attributes and behaviors / Non-static method can’t be overridden as static  Private method can’t be inherited, so can’t be overridden Liang,Introduction to Java Programming,revised by Dai-kaiyu 33 A Quiz which ones is correct public class Base {/


11-1 Chapter.9 Classes & Objects: Inheritance –What Is Inheritance? –Calling the Superclass Constructor –Overriding Superclass Methods –Protected Members.

method, however, they both have the same signature. 11-17 Overriding Superclass Methods Both overloading and overriding can take place in an inheritance relationship. Overriding can only take place in an inheritance relationship. Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java 11-18 Preventing a Method from Being Overridden The final modifier will prevent the overriding of a superclass method in a subclass/


© 2012 Pearson Education, Inc. All rights reserved. Chapter 11: Inheritance Starting Out with Java: From Control Structures through Data Structures Second.

a different signature –When a method overrides another method, however, they both have the same signature Overloading and overriding can take place in an inheritance relationship –Overriding - only in an inheritance relationship Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java Updated by L. Lilien © 2012 Pearson Education, Inc. All rights reserved. 11-22 Preventing a Method from Being Overridden The final modifier will/


CHAPTER 10 Inheritance Copyright © 2016 Pearson Education, Inc., Hoboken NJ.

, Inc. Upper Saddle River, NJ. All Rights Reserved. 10-18 Overriding Superclass Methods Both overloading and overriding can take place in an inheritance relationship. Overriding can only take place in an inheritance relationship. Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java ©2016 Pearson Education, Inc. Upper Saddle River, NJ. All Rights Reserved. 10-19 Preventing a Method from Being Overridden The final modifier/


© 2010 Pearson Addison-Wesley. All rights reserved. Addison Wesley is an imprint of Chapter 11: Inheritance Starting Out with Java: From Control Structures.

signature. © 2010 Pearson Addison-Wesley. All rights reserved. 11-18 Overriding Superclass Methods Both overloading and overriding can take place in an inheritance relationship. Overriding can only take place in an inheritance relationship. Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java © 2010 Pearson Addison-Wesley. All rights reserved. 11-19 Preventing a Method from Being Overridden The final modifier will prevent the overriding/


Chapter 1 Object-Oriented Programming in Java. Overview ● Basics of objects and classes ● Inheritance ● Polymorphism ● Abstract classes ● Interfaces ●

at run time, depending on what tv refers to. 1.4.2 Casting Up the Class Hierarchy ● Java performs an implicit cast.  Casting up the class (inheritance) hierarchy. 1.4.3 Casting Down the Class Hierarchy ● Incorrect if tv were to refer to a /reference can invoke the corresponding method in any of its subclasses. ● Java defines four levels of access: private, public, protected and package. Summary ● Classes that are not related by inheritance can be brought under the common umbrella of an interface by a third/


11/23/2015Assoc. Prof. Stoyan Bonev1 COS240 O-O Languages AUBG, COS dept Lecture 35 Title: C# vs. Java Inheritance & Polymorphism Reference: COS240 Syllabus.

method of the Person class public int CallOverriddenGetSleepAmt() { return base.GetSleepAmt() ; } } // end of class Student Assoc. Prof. Stoyan Bonev 11/23/2015 41. Formal transition from Inheritance in Java context To Inheritance in C# context Source:Lec Java Inheritance 42 Superclass public class Person{ private String name; public Person() { name = “no_name_yet”; } public Person(String initialName) { this.name = initialName; } public String getName() { return name; } public void/


1 Part1 FaaDoOEngineers.com. 2 Day 2 Coverage Inheritance Method Overriding Abstract Class Interface Overview of predefined packages Creating User Defined.

Overriding Abstract Class Interface Overview of predefined packages Creating User Defined Packages FaaDoOEngineers.com Inheritance, Interface & Abstract Class FaaDoOEngineers.com 4 Objectives Inheritance Method Overriding Use of super keyword Interface Abstract Class FaaDoOEngineers.com 5 No Multiple Inheritance In Java Inheritance The ability of a class of objects to inherit the properties and methods from another class, called its parent or base class. The class that/


JAVA: An Introduction to Problem Solving & Programming, 6 th Ed. By Walter Savitch ISBN 0132162709 © 2012 Pearson Education, Inc., Upper Saddle River,

ISBN 0132162709 © 2012 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved UML Inheritance Diagrams Figure 8.2 A class hierarchy in UML notation JAVA: An Introduction to Problem Solving & Programming, 6 th Ed. By Walter Savitch ISBN 0132162709 ©/ 2012 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved UML Inheritance Diagrams Figure 8.3 Some details of UML class hierarchy from figure 8.2 JAVA: An Introduction to Problem Solving & Programming, 6 th Ed. By Walter Savitch /


 2003 Prentice Hall, Inc. All rights reserved. 1 Chapter 9 - Object-Oriented Programming: Inheritance Outline 9.1 Introduction 9.2 Superclasses and Subclasses.

–Additional behaviors  2003 Prentice Hall, Inc. All rights reserved. 3 9.1 Introduction Class hierarchy –Direct superclass Inherited explicitly (one level up hierarchy) –Indirect superclass Inherited two or more levels up hierarchy –Single inheritance Inherits from one superclass –Multiple inheritance Inherits from multiple superclasses –Java does not support multiple inheritance  2003 Prentice Hall, Inc. All rights reserved. 4 9.1 Introduction Abstraction –Focus on commonalities among objects in/


8. Inheritance “Is-a” Relationship. Topics Creating Subclasses Overriding Methods Class Hierarchies Abstract Class Inheritance and GUIs The Timer Class.

reusability of code, modifiability of program. Promotes reusability of code, modifiability of program. Inheritance Use reserved word extends to establish inheritance. Use reserved word extends to establish inheritance. Words.java (page 442) Words.java (page 442) Words.java Book.java (page 443) Book.java (page 443) Book.java Dictionary.java (page 444) Dictionary.java (page 444) Dictionary.java Car extends Vehicle { // class contents // class contents} Visibility Modifiers Visibility modifiers affect the/


Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Java Software Solutions Foundations of Program Design Sixth Edition by Lewis.

, and testing of the existing software Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 8-7 Deriving Subclasses In Java, we use the reserved word extends to establish an inheritance relationship See Words.java Words.java See Book.java Book.java See Dictionary.java Dictionary.java class Car extends Vehicle { // class contents } Copyright © 2009 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 8-8 The protected/


Inheritance. Inheritance is a fundamental object-oriented design technique used to create and organize reusable classes Chapter 8 focuses on: deriving.

that went into the design, implementation, and testing of the existing software 8-6 Deriving Subclasses In Java, we use the reserved word extends to establish an inheritance relationship 8-7 See Words.java (page 382) Words.java See Book.java (page 385) Book.java See Dictionary.java (page 386) Dictionary.java class Car extends Vehicle { // class contents } The protected Modifier Visibility modifiers affect the way that class/


1 Object-Oriented Programming (Java), Unit 12 Kirk Scott.

represent some individual parent and sapiens doesnt represent some individual child. 18 19 12.1.7 The Hierarchy Containing Rectangle2D in the Java API Documentation The Java API documentation for the class Rectangle2D shows an inheritance hierarchy. java.lang.Object java.awt.geom.RectangularShape java.awt.geom.Rectangle2D Object is the parent class of RectangularShape and RectangularShape is the parent class of Rectangle2D. The class names/


© 2010 Pearson Addison-Wesley. All rights reserved. AN INTRODUCTION TO INHERITANCE.

signature. © 2010 Pearson Addison-Wesley. All rights reserved. 11-19 Overriding Superclass Methods Both overloading and overriding can take place in an inheritance relationship. Overriding can only take place in an inheritance relationship. Example: –SuperClass3.java,SuperClass3.java –SubClass3.java,SubClass3.java –ShowValueDemo.javaShowValueDemo.java © 2010 Pearson Addison-Wesley. All rights reserved. 11-20 Preventing a Method from Being Overridden The final modifier will prevent the overriding/


JAVA, JAVA, JAVA Object-Oriented Problem Solving Ralph Morelli Trinity College Hartford, CT presentation slides for published by Prentice Hall Second Edition.

. All rights reserved. Chapter 4: Applets Technical Terms abstract class abstract interface abstract method applet Application Programming Interface (API) event-driven programming Graphical User Interface (GUI) import declaration inheritance inheritance hierarchy interface polymorphic method Java, Java, Java, 2E by R. Morelli Copyright 2002. All rights reserved. Chapter 4: Applets Summary Of Important Points An applet is an embedded program that runs within the context of/


 2002 Prentice Hall. All rights reserved. Page 1 Inheritance: Object-Oriented Programming Outline 9.1 Introduction 9.2 Superclasses and Subclasses 9.3.

classes Helps add new capabilities to system  2002 Prentice Hall. All rights reserved. Page 3 9.1 Introduction (cont.) Object-oriented programming –Inheritance Subclass inherits from superclass –Subclass usually adds instance variables and methods Single vs. multiple inheritanceJava does not support multiple inheritance Interfaces (discussed later) achieve the same effect “Is a” relationship –Composition “Has a” relationship  2002 Prentice Hall. All rights reserved. Page/


Fundamentals of Java. © Aptech Ltd. Inheritance and Polymorphism/Session 10 2  Describe inheritance  Explain the types of inheritance  Explain super.

things is called subclassing and the child groups are known as subclasses.  Similarly, Java provides the concept of inheritance for creating subclasses of a particular class.  Also, animals such as chameleon /super.accelerate(speed); System.out.println(“Maximum acceleration:”+ speed + “ kmph”); } /** * Define the TestVehicle.java class */ public class TestVehicle { /** © Aptech Ltd. Inheritance and Polymorphism/Session 10 24 * @param args the command line arguments */ public static void main(String[] /


Dr. Majed Abdouli Copyright © 2015 adapted from John Wiley & Sons. All rights reserved.1 Chapter 9 - Inheritance.

Inheritance Hierarchy of Question Types  Example: Computer-graded quiz There are different kinds of questions A question can display its text, and it can check whether a given response is a correct answer. You can form subclasses of the Question class. Copyright © 2015 Dr. Majed Abdouli8 section_1/Question.javaQuestion.java/String getName() {... } public double getSalary() {... } } Declare a class Manager that inherits from the class Employee and adds an instance variable bonus for storing a salary bonus. /


CompSci 420.1 Inheritance & Interfaces. CompSci 420.2 Inheritance & Interfaces The Plan  Motivate Inheritance  Motivate Interfaces  Examples  Continue.

dont want to write all the methods needed to implement an interface.  The default implementations of the methods in interfaces exist. The Solution:  Extend an Adapter CompSci 420.22 Inheritance & Interfaces TrackerAdapter.java public abstract class TrackerAdapter implements Tracker { public Point2D.Double getLocation() { return new Point2D.Double(); } public double getScaleFactor() { return 1; } public double getRotationAddition() { return 0; } public void advanceTime() { advanceTime(GameLoop/


Java Programming: Guided Learning with Early Objects Chapter 9 Inheritance and Polymorphism.

class derived from existing class –Also called derived class Superclass: existing class that other classes are derived from –Also called base class Java Programming: Guided Learning with Early Objects5 Figure 9-1 Inheritance hierarchy Java Programming: Guided Learning with Early Objects6 Inheritance (continued) Inheritance has a hierarchical structure Syntax: modifiers class ClassName extends BaseClass modifiers { memberList } private members of the superclass cannot be accessed directly/


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