use of inheritance

1. What is the "is-a" relationship of public inheritanceThe most important criterion in C + + object-oriented guidelines is that public inheritance means "is-a". Remember this rule.If you implement a Class D (derived) public that inherits from Class

In "Think in Java" There is a sentence: Reuse code is one of Java's many compelling features. But to be a revolutionary language, it's not enough to just copy the code and change it, and it has to be able to do more. The most noticeable in this

I believe that everyone is perference familiar, this is what we often say preferences, preference settings, some data can be saved. For example, for some components, we use the last. I hope the next launch will still take effect, annoying. In

Relationships between classes and classes in Java1. Aggregation relationship: Two classes have a low degree of association and can exist separately.2. Combined relationship: Two are relatively high degree of association.How to represent this

Java object-oriented three major features: encapsulation, inheritance, polymorphism;Inheritance is an important means of implementing class reuse, in addition, it can be combined to achieve this reuse, compared with the use of inheritance to achieve

Six principles of Design pattern (2): The principle of the Richter replacementThere must have been a lot of doubts about the name of this principle as I have just seen it. The reason is that the principle was first introduced in 1988 by a woman

"See" http://www.cnblogs.com/jiangzhengjun/p/4260969.htmlSingle responsibility principle (SRP)--the definition of cohesionThe definition of a single responsibility principle: For a class page, there should be only one reason for it to vary (there

Policy ModeStrategy mode: In our life in fact there are many such examples, such as we have to do one thing, say reading, a like to look at the introduction, and then look at the table of contents, and then from the first chapter, this is a reading

I finished reading the book today and thought it was too good to write. In a simple example, the application of encapsulation is explained in detail. I think this idea can be applied to the Linux operating system design completely. For example, the

The three main characteristics of object-oriented language: encapsulation, inheritance, polymorphism.Encapsulation: A class left to the external interface is always less than the internal implementation of the method.Inheritance: Self-thunder can

OC Object-oriented-inheritanceFirst, the basic conceptProgram of the world and the Human "object" of the world in the mind is no difference, rich two generations inherit the parents, naturally have all the resources parents have, the subclass

Through the UML diagram of the design between classes and classes, the code of the Software encapsulation, refactoring, this method not only makes the code has great extensibility and excellent maintainability, at the same time, in my opinion, this

Decorator often translated into "decoration", I think translated into "painter" more image point, painter (decorator) is used to brush paint, then painted objects we call decoratee. These two entities are required in decorator mode. Decorator

The introduction recently saw a video explaining the. NET design pattern in Youtub, where one of the authors ' understandings impressed me deeply: the so-called design pattern is actually using object-oriented programming to solve the problem of

First, the basic conceptProgram of the world and the Human "object" World in the mind is no difference, rich second generation inherited the parents, naturally have all the resources parents have, the subclass inherits the parent class also has the

(3) PHP project application of design pattern (policy pattern: mall cash register system) 1 policy pattern description policy pattern defines a series of algorithms and encapsulates each algorithm, they can also be replaced with each other. The rule

Computer software plays an important role in modern science and technology, and has become one of the key fields of high-tech competition in the information society. In this article, I aim at the two development methods of computer software: The

When drawing a class diagram, it is important to clarify the relationship between classes and classes. The relationships of a class are generalized (generalization), implemented (realization), dependent (Dependency), and associative (association).

One of the three cornerstones of the package1. What is encapsulation?Encapsulation (encapsulation) is also known as the hidden implementation (hiding the implementation). is to expose only the external interface of the code unit, and hide its

PHP Core Knowledge Essentials, PHP core points PHP: scripting language, website building, server-side running PHP Definition: A server-side HTML scripting/programming language, is a simple, object-oriented, interpreted, robust, secure, high