object oriented programming inheritance example java

... Introduction • Three types of inheritance – public • Every object of derived class also object of base class – Base-class objects not objects of derived classes – Example: All cars vehicles, but ... Abstraction – Focus on commonalities among objects in system • “is-a” vs “has-a” – “is-a” • Inheritance • Derived class object treated as base class object • Example: Car is a vehicle – Vehicle properties/behaviors ... 9.2 Inheritance hierarchy for university CommunityMembers CommunityMember Employee Faculty Student Staff Alumnus Single inheritance Teacher Single inheritance AdministratorTeacher Multiple inheritance...

Ngày tải lên: 02/04/2014, 06:20

... is object orientation? What is the UML? What is Object- Oriented Analysis and Design? How you OOAD? What are object- oriented development methodologies? How you use Java to write truly object- oriented ... witnessed over the years, object- oriented programming has seemed to me the most significant in terms of how much easier it makes the programming task Object- oriented programming in Java or C++ can really ... is to switch the way you think about programming to use the object- oriented programming paradigm What Is an Object- Oriented System? Just what is an object- oriented system? What makes an OO system...

Ngày tải lên: 22/08/2013, 14:52

... is object orientation? What is the UML? What is Object- Oriented Analysis and Design? How you OOAD? What are object- oriented development methodologies? How you use Java to write truly object- oriented ... witnessed over the years, object- oriented programming has seemed to me the most significant in terms of how much easier it makes the programming task Object- oriented programming in Java or C++ can really ... is to switch the way you think about programming to use the object- oriented programming paradigm What Is an Object- Oriented System? Just what is an object- oriented system? What makes an OO system...

Ngày tải lên: 20/12/2013, 21:16

... Object- Oriented Programming With Java, Second Edition Barry J Holmes Daniel T Joyce JONES AND BARTLETT PUBLISHERS Object- Oriented Programming with Java Second Edition Barry ... J.) Object- oriented programming with Java / Barry Holmes, Daniel Joyce p cm Includes bibliographical references and index ISBN 0-7637-1435-6 Java (Computer program language) Object- oriented programming ... Intended Audience Object- Oriented Programming with Java is written for first-year college/university programming courses worldwide It introduces you to object- oriented design and programming and...

Ngày tải lên: 05/03/2014, 13:20

... Accessible from objects outside the class Yes No No Object Oriented Example class Employee{ private: int privA; protected: int protA; public: int pubA; }; //base class Object Oriented Example (Contd.) ... y=b; // valid } Object Oriented }; Example (Contd.) class C : public B { public : void func_c() {int x,y; x=a; // not valid y=b; // valid } }; Object Oriented Constructors under inheritance The ... Manager } • An object of a derived class can be treated as an object of its base class when manipulated through pointers However, the opposite is not true Object Oriented Types of Inheritance A...

Ngày tải lên: 23/03/2014, 04:21

... provided separated by a comma • The rules of inheritance and access for multiple inheritance are the same as for single inheritance Object Oriented Programming with C++ / Session / of 44 Constructors ... Constructors and Destructors s Use Pointers to Objects to access Member Functions Object Oriented Programming with C++ / Session / of 44 Session Objectives(Contd.) s Describe Virtual functions ... Describe Abstract classes s Describe Virtual destructors Object Oriented Programming with C++ / Session / of 44 Multiple Inheritance s Multiple inheritance is the process of creating a new class from...

Ngày tải lên: 23/03/2014, 04:21

... an object that distinguishes it from all other objects • The failure to recognize the difference between the name of the object and the object itself is the source of many errors in object- oriented ... are each a type of car 15 Object example Audi BMW Z3 Corvette Car Car Car • Notice that all objects are of the same type All objects are cars! 16 Classes and Objects • An object is an instance of ... getGasLevel():GasLevel 34 Object Oriented Programming • When writing object- oriented programs, first one must define the classes (like Car) • Then, while the program is running, the instances of the classes (objects)...

Ngày tải lên: 31/03/2014, 20:20

... (II) • Object- Oriented Programming – Introduce protected member access – Relationships • "is a" - inheritance – Object of subclass "is a" object of the superclass • "has a" - composition – Object ... 102 103 104 105 // Fig 27.3: InheritanceTest .java // Demonstrating the "is a" relationship import java. text.DecimalFormat; import javax.swing.JOptionPane; public class InheritanceTest { public static ... Hall, Inc All rights reserved Relationship between Superclass Objects and Subclass Objects • Object of subclass – Can be treated as object of superclass • Reverse not true – Suppose many classes...

Ngày tải lên: 31/03/2014, 20:20

... Object Oriented Programming using Java Notes for the Computer Science Module Object Oriented Programming COMP200 Adapted from Introduction to Programming Using Java Version 5.0, ... object- oriented programming laguage provides support for the following objectoriented concepts: Objects and Classes Inheritance Polymophism and Dynamic binding 1.1.1 Programming Paradigms Object- oriented ... conceptual picture of object- oriented programming: An object- oriented program is structured as community of interacting agents called objects Each object has a role to play Each object provides a...

Ngày tải lên: 27/06/2014, 12:20

... 18 Object Assignment Objects are assigned by reference Object object1=new Object( ); object2 =object1 ; Object content Variable index 0xf1: new object1 () Object object1; 0xf2: new object2 () Object ... 14 Java Packages Java hierarchically organizes classes into packages java. lang java. text java. util … Classes need to be referred using its complete name (package + class name): for example, java. util.Calendar ... (reference) as its value Data values Variable index 0xf1: object1 ’s content object1 : 0xf1 0xf2: object2 ’s content object2 : 0xf2 … object3 … Objects are reference data type 2008 © Department of Information...

Ngày tải lên: 27/06/2014, 21:20

... Object Oriented Programming using Java Notes for the Computer Science Module Object Oriented Programming COMP200 Adapted from Introduction to Programming Using Java Version 5.0, ... object- oriented programming laguage provides support for the following objectoriented concepts: Objects and Classes Inheritance Polymophism and Dynamic binding 1.1.1 Programming Paradigms Object- oriented ... conceptual picture of object- oriented programming: An object- oriented program is structured as community of interacting agents called objects Each object has a role to play Each object provides a...

Ngày tải lên: 12/08/2014, 21:21

... Both the java package and the javax package contain sub-packages One of the sub-packages of java, for example, is called “awt” Since awt is contained within java, its full name is actually java. awt ... named javax.swing, which includes such classes as javax.swing.JButton, javax.swing.JMenu, and javax.swing.JFrame The GUI classes in javax.swing, together with the foundational classes in java. awt ... wrapper classes For example, an object of type Double contains a single instance variable, of type double The object is a wrapper for the double value For example, you can create an object that wraps...

Ngày tải lên: 12/08/2014, 21:21

... command line using the command java −jar” For example: java −jar JarFileName.jar 2.6 Creating Abstractions I N THIS SECTION , we look at some specific examples of object- oriented design in a domain ... for the standard Java API was produced using javadoc Javadoc documentation is prepared from special comments that are placed in the Java source code file Recall that one type of Java comment begins ... packages to have the same name For example, both the java. awt package and the java. util package contain classes named List If you import both java. awt.∗ and java. util.∗, the simple name List will...

Ngày tải lên: 12/08/2014, 21:21

... subclass of Object, a variable of type Object can refer to any object whatsoever, of any type Java has several standard data structures that are designed to hold Object s, but since every object is ... understandable if we change our terminology a bit: In object- oriented programming, calling a method is often referred to as sending a message to an object The object responds to the message by executing ... express the behavior of the objects This is a powerful idea However, something like this can be done in most programming languages The central new idea in object- oriented programming the idea that...

Ngày tải lên: 12/08/2014, 21:21

... as we begin GUI programming. ) 5.1 Interfaces Some object- oriented programming languages, such as C++, allow a class to extend two or more superclasses This is called multiple inheritance In ... 101 THIS SECTION simply pulls together a few more miscellaneous features of object oriented programming in Java Read it now, or just look through it and refer back to it later when you need ... implicitly.) The inner class object is permanently associated with the containing class object, and it has complete access to the members of the containing class object Looking at an example will help,...

Ngày tải lên: 12/08/2014, 21:21

... object would like to listen for events from the button This example shows a general technique for programming the behavior of a GUI: Write classes that include event-handling methods Create objects ... complete source code for the RandomStringsPanel import import import import java. awt.Color; java. awt.Font; java. awt.Graphics; javax.swing.JPanel; 126 /∗ ∗ T h i s panel d i s p l a y s 25 c o p i e ... something that is done by an object called an event listener An event listener object must contain instance methods for handling the events for which it listens For example, if an object is to serve as...

Ngày tải lên: 12/08/2014, 21:21

... nested classes to define listener objects A special form of the new operator is used to create an object that belongs to an anonymous class For example, a mouse listener object can be created with an ... MouseAdapter to handle mouse events: import import import import java. awt.Component; java. awt.event.MouseEvent; java. awt.event.MouseListener; javax.swing.JFrame; 135 public class ClickableRandomStringsApp ... has the input focus When this happens, the JButton object creates an event object belonging to the class java. awt.event.ActionEvent The event object is sent to any registered listeners to tell...

Ngày tải lên: 12/08/2014, 21:21

... list to objects of a specified type Parameterized types extend Java s basic philosophy of type-safe programming to generic programming 167 8.1 Generic Programming in Java JAVA ’ S GENERIC PROGRAMMING ... For example, adding an object to a Set has no effect if that object was already in the set • coll.contains (object) –returns a boolean value that is true if object is in the collection Note that object ... is a subclass of the class named Object This means that every object can be assigned to a variable of type Object Any object can be put into an array of type Object[ ] An ArrayList serves much...

Ngày tải lên: 12/08/2014, 21:21

... comparison of objects in Java, and that is to provide a separate object that is capable of making the comparison The object must implement the interface Comparator, where T is the type of the objects ... S NOTED ABOVE , JAVA S GENERIC PROGRAMMING does not apply to the primitive types, since generic data structures can only hold objects, while values of primitive type are not objects However, ... numbers, but Java will automatically convert the 17 to the corresponding wrapper object, new Integer(17), and the wrapper object will be added to the collection (The creation of the object does...

Ngày tải lên: 12/08/2014, 21:21