eai design patterns

Design principle one : single principle of responsibility Definition: There should be only one reason for a class to cause it to change. Advantages: Reduce the complexity of the class, improve the readability of the class, improve the maintainability of the system. Example: Super Human public class Superman {public void Maintains world peace () {//Superman maintains world Peace}} Extension: public class Animal {Public void Breathe (String animal) {Sys

Why design patterns? Let's take a look at the six principles and use the design pattern principles. Introduction　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 I don't like reading books very much, because I forgot to read ten lines of books, so I read the left teacher and copied it to improve my memory. This is the http://www.cnblogs.com/zuoxiaolong/p/pattern1.html of o

hungrysingle () // Step 2 7 {8 9} 10 11 public static hungrysingle getinstance () // step 3 12 {13 return sinstance; 14} 15 16}View code Statement of the single-Profit Mode in unity: 1 public sealed class SingletonMoBehaviour: MonoBehaviour 2 { 3 private static volatile SingletonBehaviour instance; 4 private static object syncRoot = new Object(); 5 public static SingletonBehaviour Instance 6 { 7 get 8 { 9 if (instance == null) 10

Since the advent of Java-EE, it has greatly simplified the enterprise-level development under the java-based. But as Java EE becomes more and more widely used in various fields, developers are becoming aware of the need for a way to standardize the application's development process by standardizing the architectural layers of the application. The structure layer typically encapsulates complex techniques that are independent of the business logic to establish a weak connection between the busines

base classDo not let classes derive from specific classesA variable cannot hold a reference to a specific class6: Abstract Factory Method mode provides an interface for creating a family of related or dependent objects without having to specify a specific class.The factory method pattern uses inheritance: Delegate the creation of objects to subclasses, subclasses implement factory methods to create objects, and abstract factory method patterns use a

Design principles of design patterns (medium)Interface Segregation Principle, then multiple interfaces are used instead. Each interface serves only one submodule. This is similar to the single responsibility principle shared for the last time. Purpose of designing the interface isolation principle: when designing an application, if a module contains multiple sub-

Talking about 23 design patterns from chasing mm-it's classic. Go to your blog and add them first. As a programmer, the design pattern is becoming increasingly popular. the attention of the net community. This change is very gratifying. the Java Community is ahead of us, but this situation may change one day. Talking about 23 Java

Design the samples in Java. Build Status: Introduction Design patterns are formalized best practices and programmer can use to solve common problems when designing a appli cation or system. Design patterns can speed up the development process by providing tested, proven de

The original * * * * may need to change the application, separate them (encapsulated), and do not mix with the code that does not need to change. The original * * * for interface programming, rather than for implementation programming, here for interface programming really mean "for super type Supertype programming", the key is polymorphism. The original * * * Multiple use combination, less with inheritance. Mode * * * * Strategy mode (Strategy pattern): Defines the algorithm family (a group

Design Design patterns are just for the Java architect--at least you've probably always thought so. In fact, design patterns are very useful for everyone. If these tools are not patents for "architecture astronauts", what are they? Why are they very useful in the application

Com.raylee.designpattern.strategy.ch04;public class Client {//The user, Department, and course are subject to additional deletions public static void main (string[] args) {Courseserviceimpl Courseserviceimpl = new Courseserviceimpl (); Courseserviceimpl.importcourse (); Courseserviceimpl.exportcourse (); Userserviceimpl Userserviceimpl = new Userserviceimpl (); Userserviceimpl.importuser (); Userserviceimpl.exportuser () ;D Eptserviceimpl Deptserviceimpl = new Deptserviceimpl ();d eptserviceimp

pool overflow, if the instantiated object is not exploited for a long time,The system is considered garbage and is recycled by GC resulting in loss of object state　　Lazy mode:　　　　　　A Hungry man mode:Dual Lock mode:　　　　　　Summarize:　　1, lazy mode features: Thread insecure, load classes faster, run time to get objects slower,2, a Hungry man mode features: Thread safety, load class is slow, run time to get objects faster3, double lock mode: Thread-safe, load class faster, run-time to get objects at

1, what is the design modeWith regard to design patterns, there are some more official definitions, such as: Design pattern is a set of reusable, most known, categorized purposes, code design experience Summary. Design

Introduction to Design PatternsDesign patterns represent best practices and are often used by experienced object-oriented software developers. Design pattern is a solution to the general problems faced by software developers in the process of software development. These solutions are summed up by many software developers over a long period of trial and error.Desi

); }/** * Will gather the observers to empty */public synchronized void Deleteobservers () {obs.removeallelements (); }/** * Set "changed" to True */protected synchronized void setchanged () {changed = TRUE; }/** * Resets "changed" to False */protected synchronized void clearchanged () {changed = FALSE; }/** * Detects if this object has changed */public synchronized Boolean hasChanged () {return changed; }/** * Returns the number of observers of this This class represents an obse

Seven major design principles:1. Single Duty principle: one class is responsible for a duty.2, the Richter replacement principle: Subclasses can extend the function of the parent class, but cannot change the original function of the parent class.3, dependency inversion principle: The high-level module should not rely on the lower layer module, both should rely on its abstraction; abstraction should not depend on detail; detail should depend on abstrac

) observable; Toast.maketext (context, "good teacher! ", 1). Show ();} public interface listeming{public void Lisetem (String sss);}Package Com.ferris.androidpattern;import Android.app.activity;import Android.os.bundle;import Android.view.View; Import Android.view.view.onclicklistener;import Android.widget.toast;import Com.ferris.observice.student;import Com.ferris.observice.student.listeming;import Com.ferris.observice.teacher;public class StrategyActivity extends Activity {private Teacher Teac

returnSingle ; One } A}A Hungry Man sample code:1 Public classSingleton {2 PrivateSingleton () {}3 Private Static FinalSingleton single =NewSingleton (); 4 Public StaticSingleton getinstance () {5 returnSingle ; 6 } 7}Lazy Thread-safety improvements, Method 1:1 Public classSingleton {2 //privatization default constructor3 PrivateSingleton () {}4 Private StaticSingleton single=NULL; 5 //static Factory method (plus synchronous method)

One of the several javaScript design patterns-the single mode and the javascript Design Pattern JavaScript is a weak type, dynamic, prototype-based language. This language feature makes it very easy, It is even common to implement some of these modes. The idea of the standalone mode is to ensure that a specific class has only one instance. This means that when y

The design pattern (English pattern) is a solution to the recurring problems in object-oriented design. The term was introduced into computer science in the 1990 's by people such as Erich Gamma and others from the field of architectural design. The meaning of the term is also controversial. The algorithm is not a design