hotfix patterns

32 design patterns and 32 Design Patterns 32 Design Patterns Good stuff has to be transferredAfter reading this article on the Internet, the author uses a simple language to compare the 32 java models, which is very helpful. Creation Mode 1. FACTORY-try to catch up with MM. The chicken wings of McDonald's and the chicken wings of KFC are what MM loves. Although t

voidremoveobserver (Observer Observer) {observers.remove (Observer); } Public voidnotifyobservers () { for(Observer observer:observers) {observer.update ( This); } }}MyTest package Com.singland.dp.observer; import Org.junit.Test; public class MyTest {@Test public void Test () {Subject Subject = new Subject (); Subject.registerobserver ( new MyObserver1 ()); Subject.registerobserver ( new MyObserver2 ()); Subject.setmsg ( Linda "); Subject.not

The following 23 design patterns are mentioned in the design pattern book:Abstractfactory: Provides an interface to create a series of related or interdependent objects without specifying their specific classes.Adapter: Transforms the interface of a class into another interface that the customer wants. The adapter mode makes it possible for those classes that would otherwise not work together because of incompatible interfaces to work together.Bridge:

sentence may not be easy-to-understand. To put it bluntly, it means the conventional rule. You only need to clearly describe whether the corresponding occasion is really suitable)5. pattern is a means to record the software architecture. (The meaning of this sentence is to tell you which modes are used in this software architecture, and my colleagues have stipulated that your modifications or extensions must follow the general direction of the mode, the steps against these

com.roc.decorate; Public class extends fight{ @Override publicvoid boxing () { System.out.println (" Punch ");} } Packagecom.roc.decorate; Public classDscribefightextendstruefight{/*** You can't say it's a direct call, to describe, to describe*/ Private voidsay () {System.out.println ("Auntie, I'm having a game with xiaoming."); } Public voidBoxing () { This. Say (); Super. boxing (); System.out.println ("Great place to stay"); }} Package com.roc.decorate;

To tell the truth, the feeling is not very much, may not encounter too many scenes,So there's no sense in the application scenario.Anyway, all kinds of patterns are the instances of the class passed, over time, produced some rules ... ：）#The wheels, the engines, the bodies, the definitions, they don't have to change.classWheel:def __init__(self, name): Self.name=namedefAccept (self, visitor):#each visitor is the same, but the method is different, for

Category: After learning about such a multi-mode model, many behavior patterns have also been designed during the learning process. What are the behavior patterns? One by one. Iterator Mode Http://blog.csdn.net/huo065000/article/details/24352437 Intermediary Mode Http://blog.csdn.net/huo065000/article/details/22856883 Memorandum Mode Http://blog.csdn.net/huo065000/articl

Design Patterns-factory method patternsDr. Yan Hong's book "JAVA and patterns" describes the factory method patterns in this way:　　The Factory method mode is the class creation mode, also known as the Virtual Constructor mode or the Polymorphic Factory mode.The purpose of the factory method mode is to define a factory interface for creating product objects and po

Design Patterns and concurrent producer-consumer patternsProducer-consumer mode is a classic multithreaded design pattern. It provides a good solution for collaboration between multiple threads.In producer-consumer mode, typically consists of two types of threads, that is, several producer threads and a number of consumer threads. Producer LineProcess is responsible for submitting user requests, and the consumer thread is responsible for the specific

Prototype mode: Create a new object through the prototype instance, no longer need to care about the type of the instance itself, as long as the method of cloning itself, you can use this method to obtain new objects, without having to go through new to create.Prototype patterns are available in the following ways: Simple form (new object), Shallow clone, deep cloneThe previous two methods are relatively simple, I directly with deep cloning to achieve

The structural design pattern solves the coupling problem between the modules from the structure of the program. The following seven modes are included: Adapter mode: An excuse for the class can be matched to another interface Combination mode: The combination of objects Proxy mode: A Simple object instead of a complex object that will be called later Appearance Mode: A class represents a subsystem Enjoy meta mode: used to share objects, where each instance does not s

Python versionhttps://github.com/faif/python-patterns/blob/master/structural/mvc.py#!/usr/bin/env python#-*-coding:utf-8-*-"""*tl;dr80separates data in GUIs from the ways it is presented, and accepted."""classModel (object):def __iter__(self):RaiseNotimplementederrordefGet (Self, item):"""Returns a object with a. Items (), call method, iterates over key,value pairs of its information.""" RaiseNotimplementederror @propertydefItem_type (self):Rai

Design patterns are divided into three main types: creation, structure and behavior. This article describes the observer patterns, template method patterns, command patterns, state patterns, and responsibility chain patterns in be

Reprint: http://blog.csdn.net/u013142781/article/details/50825301 There are 23 kinds of Java Classic design patterns, which are divided into three categories: the creation mode (5 kinds), the structure pattern (7 kinds) and the behavior pattern (11 kinds). Behavioral patterns are subdivided into 11 types: Policy mode, template method pattern, observer mode, iterative sub mode, responsibility chain mode, C

I. BACKGROUNDWhen it comes to producer-consumer models, it is necessary to mention multithreading, multithreaded development is commonly used in development, multi-thread programming is more stable than single-threaded,A thread that hangs does not affect the normal operation of the entire program. However, dirty reads occur when multiple threads are manipulating a data source at the same time.Ii. introduction of producer consumer ModelsThe producer-consumer model solves the problem of strong cou

. the difference between equals and = = Earlier we saw that both the Clone object and the equals and = = of the original object return false, whether it is a shallow copy or a deep copy. So what is the relationship between equals and = =? For basic data types, = = compares their values. For non-primitive types of objects, = = comparison is their address in memory, such as the previous oldobject and newobject the same address, while the Equals method, if it does not overwrite the quilt class, it

Before understanding the differences, let's look at how the design patterns work and make better use of one of the two (MVC design and MVP. The (MVC design and MVP) model has been used for several years. A key problem to be solved is the main focus of object-oriented, separated user interfaces and business layers. There are also some frameworks based on which Java struts, Ror, Microsoft Smart Client software factory (CAB), Microsoft Web client softwar

So far, I have finished learning several design patterns of the created model. Let's take a look at them. It takes a short time. It is better to create a model that is relatively simple and will not be so smooth in the future. since there is no real practice in the project, so far, I think I have not mastered it, just a little understanding of the design model. People speak English, so I also summarize the knowledge I know about the creation-type

the parent class, the post-condition (that is, the return value of the method) of the method is stricter than that of the parent class; Dependency inversion principle: Invert dependency to dependency Interface Upper-layer modules should not depend on lower-layer modules. They all depend on an abstraction; Parent classes cannot depend on child classes. They all depend on abstract classes; Abstraction cannot depend on or depend on abstraction; Interface isolation principle: The dependence of a

void Decrator (person component) {this.component = component; public override void Show () {if (component!=null) {component. Show (); }}}///base. Show ();}} class Jonson:finery {public override void Show () {Console.WriteLine ("Jeans"); Base. Show (); }} class Shose:finery {public override void Show () {Console.WriteLine ("Bull Shoes"); Base. Show (); } }}* Each functional layer is loaded together, then the inner function is called by the topmost instance