an introduction to object oriented programming with java

... 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

... things to identify and classify them, but we can scan for differences, and obtain an overall rough “feeling” for a scene with a quick glance. Humans have evolved very precise visual skills: we can ... images to be sharp, clear and detailed; machines prefer their images to be simple and uncluttered. Examples of (1) may include: 1 2 CHAPTER 1. INTRODUCTION Enhancing the edges of an image to make ... different tasks and problems, and often we would like to distinguish the nature of the task at hand Image enhancement This refers to processing an image so that the result... to us in

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

... generated by an object of type RandomStringsPanel If panel is a variable that refers to the panel object, we can create a mouse listener object and register it with the panel with the statements: ... 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... button ... contains a content pane (and can contain a menu bar). You can add content to an applet either by adding content to its content pane or by replacing the content pane with another component. In

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

... assigned to a variable of type Object Any object can be put into... criterion for testing non-null objects for equality can differ from one kind of collection to another.) • coll.remove (object) ... investigate the object-oriented concepts of encapsulation, inheritance, and polymor- phism. The game is inspired by Timothy Budd’s version in his book AN INTRODUC- TION TO OBJECT-ORIENTED PROGRAMMING. ... Object as the type of an array In this case one can place anything into the array because, in J AVA, every class is a subclass of the class named Object This means that every object can

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

... Python, Ruby, Java, and Dot Net, and C port. Summary In this chapter we learned how to use some advanced OOP concepts in PHP. We learned how to retrieve information from any object, and learned ... with our existing code? To make it compatible with our existing code, we need to develop the wrapper object, which implements the same DocManager interface but uses the GoogleDoc object to ... version of a Writely object: So how does it fit with. .. using GoogleDocs object } } ?> Now we will just instantiate an instance of GoogleDocsAdapter and then use that instance in our core code

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

... 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" • Copy an object reference to another. For example: set anObject1 to anObject2 • Test whether two object ... refer to the same object. For example: if anObject1 = anObject2 Micro Focus Extension • 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

... Dark Ages of programming, you had to load and run a programming editor to write the program’s source code. Next, you had to close the editor and load the language compiler program to check the ... program Welcome to the world of object- oriented programming and C#! The primary goal of this book is to use the C# programming language from Microsoft to teach you object- oriented programming, or OOP. This ... you had to load an assembler program to convert the source code to assembly language. Finally, you had to load and run a linker program to combine all the elements of your program into an executable...

Ngày tải lên: 15/02/2014, 07:20