an introduction to object oriented programming with java 5e

... chaotic landscape of that era.To put an end to this unsatisfactory situation, in 1996 the Object Object Management Management Group(OMG) [33], the most important standardization body for object-oriented ... class diagram and its potential translations into program code It is important to note that UML is not tailored to any specific object-oriented language; instead, we adopt a notion of object-orientation ... understanding.UML is fundamentally rooted in object-oriented concepts, with the class diagram serving as a clear representation that can be seamlessly translated into object-oriented programming languages

Ngày tải lên: 30/11/2023, 10:41

... differences, and obtain an overall rough “feeling” for a scene with a quick glance Humans have evolved very precise visual skills: we can identify a face in an instant; we candifferentiate colours; we can ... Figure 1.10: Capturing an image with a CCD scanner Since this is a much slower process than taking a picture with a camera, it is quite reasonable to allow all capture and storage to be processed by ... we can see from figure 1.11, x-rays have a shorter wavelengththan visible light, and so can be used to resolve smaller objects than are possible with visible light.See Clark [2] for a good introduction

Ngày tải lên: 23/07/2014, 00:24

... want to create Web-page documentation, you need to run the javadoc tool.You can use javadoc in a command line interface similarly to the way that the javacand java commands are used Javadoc can ... mark-up commands (HTML is the languagethat is used to create web pages, and Javadoc comments are meant to be shown onweb pages.) The javadoc tool will copy any HTML commands in the comments to theweb ... using try catch to handleerrors.Exceptions The term exception is used to refer to the type of error that one might want to handlewith a try catch An exception is an exception to the normal flow

Ngày tải lên: 12/08/2014, 21:21

... important to remember some simple rules: • Each Use Case is related to at least one actor • Each Use Case has an initiator (i.e an actor) • Each Use Case leads to a relevant result (a result with ... several actors For example a person that gives cus-tomer support by the telephone and takes orders from the customer into the systemwould be represented by an actor “Support Staff ” and an actor “Sales ... diagramming language or notation tospecify, visualize and document models of Object Oriented software systems UML isnot a development method, that means it does not tell you what to do first and what to

Ngày tải lên: 12/08/2014, 21:21

... nextUniqueID in the ID variable of the object. .. to an object, not to the class itself, and there can be many objects with their own versions of the instance method But there is only one copy ... referred to by its simple name. In order to create an object that belongs to an inner class, you must first have an object that belongs to the containing class. (When working inside the class, the object ... we want a Drawable object that draws a filled, red, 100-pixel square. Rather than defining a new, separate class and then using that class to create the object, we can use an anonymous class to

Ngày tải lên: 12/08/2014, 21:21

... subpanel JButton changeMessageButton = new JButton( "Change Message " ); / / The b u t t o n ButtonHandler listener = new ButtonHandler(); Once this class exists, it can be used in an ... necessary to get the event from the button to the listener object: The listener object mustregisteritself with the button as anevent listener This is done with the statement: okButton.addActionListener(listener); ... knows how to display an applet Like aJFrame, a JApplet contains a contentpane (and can contain a menu bar) You can add content to an applet either by addingcontent to its content pane or by replacing

Ngày tải lên: 12/08/2014, 21:21

... JButtonclass For example, stopGoButton.setText(‘‘Stop’’) changes the text dis-played on the button to “Stop” AndstopGoButton.setActionCommand(‘‘sgb’’)changes the action command associated to this ... button, the button generates an event of type ActionEvent This event is sent to any listener that has been registeredwith the button as anActionListener • Listeners: An object that wants to handle ... 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 expression of the form: Trang 3new MouseListener()

Ngày tải lên: 12/08/2014, 21:21

... This has the advantage that thecreateImage()method itself cancomplete very quickly ImageIO.read(), on the other hand, can take some time toexecute Trang 3TION TOOBJECT-ORIENTED PROGRAMMING.7.1 ... users would be able to save theirwork and to open and edit existing images (See Exercise12.1.) There are many ways that the data for an image could be stored in a file Manystandard formats have ... class javax.imageio.ImageIO makes it easy to save images from a program intofiles and to read images from files into a program This would be useful in a programsuch as PaintWithOffScreenCanvas,

Ngày tải lên: 12/08/2014, 21:21

... previous(), and add(obj) that Trang 6make it possible to move backwards in the list and to add an item at the current sition of the iterator To understand how these work, its best to think of an iteratorpo-as ... are all too common As pro-grammers, we need to understand why that is true and what can be done about it.9.1.2 Java to the Rescue Part of the problem, according to the inventors of Java, can be ... As an example of using aListIterator, suppose that we want to maintain a list of items that is always sorted into increasing order When adding an item to the list, we can use aListIteratorto

Ngày tải lên: 12/08/2014, 21:21

... exception-handling 9.3.5 Programming with Exceptions Exceptions can be used to help write robust programs They provide an organizedand structured approach to robustness Without exceptions, a program can becomecluttered ... require mandatory handling are several that can occurwhen using Java’s input/output methods This means that you can’t even use thesemethods unless you understand something about exception-handling ... IllegalArgumentExceptions is not “mandatory” Amethod can throw anIllegalArgumentExceptionwithout announcing the possibil-ity And a program that calls that method is free either to catch or to ignore theexception,

Ngày tải lên: 12/08/2014, 21:21

... don't want to change your core code, because then you will have to change it a lot then On top of this there are chances that the code may break after these core changes In this scenario an Adapter ... significant problem in object oriented programming and saves the lives of millions of programmers in practical programming The main purpose of the Singleton pattern is to deliver a single instance ... single instance of object no matter how many times you instantiate it That is, if an object is instantiated once, using the Singleton pattern you can deliver only that instance when you require

Ngày tải lên: 12/08/2014, 21:21

... ReflectionProperty object object. getConstants() returns an array of constants in that object returns an array of constants in that object. getConstant() returns the value of any particular constant. If you want ... testing and Reflections Until then, keep playing with the patterns and explore them Trang 6Reflection and Unit TestingPHP5 brings in many new flavors compared to PHP4 It replaces many old APIs with ... getConstructor() returns the reference of the constructor of the object as a the reference of the constructor of the object as a getProperty() function returns a reference to any property in that object,

Ngày tải lên: 12/08/2014, 21:21

... chapter SPLObjectStorage can store any object in it When you change the main object, the object that is stored inside the SPLObjectStorage will also be changed If you try to add a specific object ... Iterators, SPL also introduced another cool object which can store any object inside it with special facilities This object is called SPLObjectStorage We will understand this using the example later ... recursion? Then RecursiveDirectoryIterator is here to save your life The recursive directory Iterator can be used to great effect with RecursiveIeratorIterator to implement the recursion Let's

Ngày tải lên: 12/08/2014, 21:21

... refactoring each and every time? To save from these disasters, here comes the need for DAL where the code will remain the same and it could be changed to support any DB at any time without any ... MySQLi and how to use some of these advanced features Connecting to MySQL in an OO Way Remember those old days when you had to use procedural function call to connect to MySQL, even from your objects ... at the following example to understand this: Trang 11} catch (PDOException $e) Calling Stored Procedures PDO provides an easy way to call stored procedures All you have to do is run "CALL SPNAME(PARAMS)"

Ngày tải lên: 12/08/2014, 21:21

... used by IBM and also used to develop the Magento Zend Framework, which is used by IBM and also used to develop the Magento which is used by IBM and also used to develop the Magento open-source ... what to do when the task type is analysis and assigned to cto and current state is new SimpleXML makes it really easy Let's take a look at the following code: Trang 9However there is something to ... SimpleXML and Xpath Let's have a look at the following XML: Trang 8This document simply states the workflow of an analysis task and then tells it what to do at which state So now you want to search

Ngày tải lên: 12/08/2014, 21:21

... will also help to understand object loading, data abstraction layers, and the importance of separation Finally, we took a closer look at how applications are done Trang 30Array to Objectabout 52extending ... 51Autoloading classes 59built in objects 137differences 11, 12exception handling 44-48history 5 iterators 49, 50 Trang 33Stored procedure, executing 171Stored procedure executing, with PHP 172 structure ... frameworks play a very important role That is why today there are so many enterprise-level frameworks in the market and you have so many choices We have learnt how to build a framework in this

Ngày tải lên: 12/08/2014, 21:21

... what objects can and cannot do. An object is called an instance of a class. An object is an instance of exactly one class. An instance of a class belongs to the class. The two Bicycle objects ... method getMaximumSpeed. 1. Draw an object diagram of an Account object with instance methods deposit and withdraw. 2. Is the getObstacleDistance method an instance or a class method? 1.3 Class and Instance Data Values Suppose ... CustomerMoto-2 : BicycleMoto-1 : Bicycle An object name is followed by the class name. Figure 1.2 Two Bicycle objects with the names Moto-1 and Moto-2 and one Customer object with the name Jon Java. class instance A...

Ngày tải lên: 08/03/2014, 02:20

... understand the fundamentals of programming and can create and use classes competently, you can then explore the Java language and object- ori- ented programming to a much greater depth. Chapters 6 and ... Audience Object- Oriented Programming with Java is written for first-year college/univer- sity programming courses worldwide. It introduces you to object- oriented design and programming and can be used ... this book are: ■ javac—the Java Language Compiler that you use to compile programs written in the Java programming language into bytecodes. ■ java the Java Interpreter that you use to run programs...

Ngày tải lên: 05/03/2014, 13:20

... programmer who wants to gain a foun- dation in object- oriented programming along with the VB language basics. Programmers transitioning from a procedural -oriented programming model to an object- oriented ... concepts of object- oriented programming methodology and design. This book provides you with the information needed to understand how you go about archi- tecting an object- oriented programming ... First, to provide you with the information needed to understand the fundamentals of programming with Visual Basic. Second and more importantly, to present you with the information required to master...

Ngày tải lên: 14/03/2014, 23:20

... objects. An account object is said to be an instance of the account class, or an instance object, or simply an instance. A class is a programming language construct, while an object is an entity ... the handle in the object reference. For example: invoke anObject "message" ã Copy an object reference to another. For example: set anObject1 to anObject2 ã Test whether two object ... refer to the same object. For example: if anObject1 = anObject2 Micro Focus Extension ã Test whether an object reference refers to an object of a particular class. For example: if anObject1...

Ngày tải lên: 12/02/2014, 23:20