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IntroductionThe previous article introduced the abstract Factory mode-c# design pattern in design mode (3)-Abstract Factory mode, this article will introduce the builder model ;Click here to view all design mode series articles navigationIntroduction to Builders ' modelsBuil
Design design Pattern C # language Description-builder (builder) mode
* This article refers to "Java and the pattern" part of the content, suitable for the design
Builder design PatternTable of Contents:
Builder mode
Builder Pattern Implementation
Sample code
Use
Applications in the JDK
Builder modeLike factory and abstract factory
worrying about the other modules will affect the use of the builder mode of the scene: 1. The same method, different execution order, produces different event results when the Builder Mode 2 can be used. Multiple steps or parts can be assembled into an object, But the resulting object content is not the same this mode can be used at this time 3. The product class is more complex, or the call to different o
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This article continues to introduce the builder model of the 23 design pattern series.Definition: Builder mode: Separates the construction of a complex object from its representation so that the same build process can create different representations. Practical scope 1, when the algorithm to create complex objects shou
Builder mode of Design Pattern
Use the factory mode to obtain simple objects.
It is better to use the builder mode when complex objects are obtained and some attributes of objects need to be configured in a complicated way.
Here we take building a car as an example. The components of the car can be freely matched.
pa
The design pattern is to generalize and merge the same parts, including not only objects (inheritance, polymorphism) but also business logic (process results, etc.), as well as data storage (using different databases).Make each part independent and decoupled. Make the UI, business logic, data can be independent, update and so on.For the builder model, the constr
built is _{0}:{1}", I,parts[i]); } } }If it were your workers, would you work consciously? (I won't, hehe ...) So need the boss to command): Public class Boss { public Shoes buidshoes (builder Builder) { Builder. Buildtread (); Builder. Buildvamp ();
The source of this article see: Https://github.com/get-set/get-designpatterns/tree/master/builder
Builder pattern uses multiple simple objects to construct a complex object step-by-stage, and this type of design pattern belongs to the creation
This article continues to introduce23 Design Mode Seriesthe builder model. Definition:Builder mode: Separates the construction of a complex object from its representation so that the same build process can create different representations.Practical Range1. When creating complex objects, the algorithm should be independent of the parts of the object and how they are assembled. 2, when the construction proces
Objective
In the previous article we learned about the factory model, introducing simple factory models, factory methods, and abstract factory models. This article introduces the builder pattern and prototype pattern in the design pattern that belong to the creation pattern.
different functionsWhen object creation is used in other objects in the system, these objects can be used in the builder mode to soar the creation of the object when the product object is not easily available for creation. This is a compensation method.③ precautionsThe builder model focuses on the part type and assembly process (order), which is the biggest difference between him and the factory model. Tem
The builder pattern is a created design pattern.Design intent: Separate a complex class representation from its construction so that the same build process can derive different representations.Instance class diagram:Ivehiclebuilder: Abstract builder, to create a vehicle object and create an abstract interface specified
"); } /// ///determine the specific assembly steps/// /// Public OverrideComputer Buildcomputer () {Buildmainframepart (); Buildscreenpart (); Buildinputpart (); returnHP; } }Finally, just wait for the conductor director commanded, assemble the computer. Look at the conductor's realization./// /// Conductor (purchasing manager) /// Public class Director { public computer Construct (
, the specific building class, will be at each step of the time, the part of the product is structured, and finally completed.Usage Scenarios for builder mode:When creating complex objects, the order in which the objects are built is stable, but when each part of the object has a different change, the builder mode can be used.Example:A very good restaurant, the recent competition, they observe the opponent,
Builder pattern: Separates the construction of a complex object from its representation, allowing the same build process to create different representations. This is the standard expression of the builder's model, but looking confusing, what is the separation of construction and representation? After an object is constructed using a constructor, it is not fixed, is it the only way to change its properties?
The design patterns in the software field provide developers with an effective way to use expert design experience. The design model utilizes the important features of the object-oriented programming language: encapsulation, inheritance, polymorphism, true understandingThe essence of the design
data.Asyncrequest (' GET ', ' beer.uri?id= ' + ID,function(RESP) {//Callback Call ResponseCallback (Resp.responsetext); });}varel = Document.queryselector (' #test '); El.addeventlistener (' Click ', Getbeerbyidbridge,false);functionGetbeerbyidbridge (e) {Getbeerbyid ( This. ID,function(beer) {Console.log (' requested Beer: ' + Beer); });}According to the builder definition, the table is a callback, that is, how to get the data after the display a
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