what abstract method

First, virtual method (virtual method)The virtual keyword is used to decorate a method in a base class. There are two things you can do with virtual:Scenario 1: The virtual method is defined in the base class, but the virtual method is not

Abstract class and abstract method and interface differences, abstract class interface differencesI. abstract classes Abstract classes and specific classes are relative, not absolute. Abstract is a conceptual term, specifically a visible and

 Http://www.cnblogs.com/loveyue/archive/2009/04/19/1439025.html 1. C # differences between classes and interfaces The interface is responsible for defining functions. The project uses interfaces to define the concepts of classes, Operation classes,

1. Abstract methods and declarations of abstract classes1) Abstract class and abstract method declarations must contain abstract2) The declaration of the abstract method has no method body: Public abstract void Fly ();3) Abstract classes and

This article introduces the object-oriented abstract methods in PHP and the use of abstract class __call cloning objects, and friends who need to be able to learn. Abstract methods and abstract classes In the OOP language, a class can have one or

We are developing a. Net-based object-orientedProgramThe concept and usage of abstract classes and interfaces are often unclear. In fact, it is not difficult to understand them. 1. What is an abstract class? Abstract classes are basic

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Reprinted from http://hi.baidu.com/sjjqaa2010/blog/item/963bd13e0cdcadf33c6d974a.html   I. abstract classes (1) abstract methods are declared only, but do not contain implementations. They can be considered as virtual methods without

Abstract methods and abstract classesIn OOP, a class can have one or more sub-classes, and each class has at least one public method as an external code to access its interface. Abstract methods are introduced to facilitate Inheritance. Let's take a

Object-oriented programs are constructed from a hierarchical structure of classes, and in a single inheritance language such as PHP, the inheritance of classes is tree-like. A root class has one or more subclasses, and then inherits one or more next-

When certain methods of the parent class are not deterministic, the abstract keyword can be used to decorate the method [abstraction], and abstract to decorate the class [abstract class].We all know that the parent class is to extract the properties

  First, define the virtual method in C: Public Virtual void virtualmethod (){......}; If virtual is added before the method name, the method is declared as a virtual method. Note that abstract and static keywords cannot be added after the

I. Use of abstractions (abstract)When certain methods of the parent class are not deterministic, the abstract keyword can be used to decorate the method [abstraction], and abstract to decorate the class [abstract class].We all know that the parent

The relationship between abstract classes and abstract methodsClasses with abstract methods must be abstract classes; Abstract classes do not necessarily have abstract methodsWhen subclasses inherit abstract classes, they must all implement (or

Http://www.cnblogs.com/denylau/archive/2010/04/11/1709573.htmlHttp://www.cnblogs.com/naariah/archive/2011/07/13/2105255.htmlHttp://www.cnblogs.com/kdalan/archive/2012/05/29/2523470.htmlHttp://www.cnblogs.com/lykbk/archive/2012/06/01/lyk19900723_daima

Abstract class and abstract method concepts and usage analysis in PHP, PHP abstraction The examples in this article describe abstract classes and abstract methods in PHP. Share to everyone for your reference, as follows: Abstract Key Words:

Php abstract method and abstract class instance analysis, php abstract class instance analysis This example describes php abstract methods and abstract classes. We will share this with you for your reference. The details are as follows: What is an

This article from: http://113620916.qzone.qq.com/blog/1209003303 C # differences between class and interface, virtual method, and abstract method, value type, and reference type1. C # differences between classes and interfacesThe interface

The examples in this article describe the PHP abstract methods and abstract classes. Share to everyone for your reference, specific as follows: What is an abstract method? A method that is defined within a class without a method is an abstract

Features of the Java abstract class:* Abstract classes cannot be instantiated* Subclass inherits Abstract class and instantiates subclass* Subclasses inherit abstract classes has penny must implement abstract methods in abstract classes* Definition