java singleton example

chosen according to your business needs. A Hungry man Standard A Hungry man (Safety protection aspect enumeration single example better than standard a hungry man)Thread-safe, efficient, and not lazy to load Enumeration single ExampleThread-safe, efficient, lazy loading (natural avoidance of reflection and deserialization)? Lazy (Static inner class of efficiency is better than standard idler) Standard

Singleton in Design Mode) Banqiao peopleHttp://www.jdon.com Definition: The Singleton mode ensures that only one instance of a class exists in a Java application. How to use it? The first form: Public class Singleton { Second form: Public class Singleton { Key to im

In the interview often asked the Java singleton model, the problem can be very good to examine the candidate's understanding of knowledge points. Singleton mode requires that only one instance object exists when the system is running.Let's take a detailed look at the key points of knowledge, and introduce five implementations, along with their pros and cons. The

In today's teacher's lecture 1 learned the role of single-row modelThe Java singleton pattern ensures that a class has only one instance, provides this instance itself and provides this instance to the system as a whole.Characteristics:1, a class can have only one instance;2, create this instance yourself;3, this instance is used throughout the system.--------------------------------The main purpose of the

man Standard A Hungry man (Safety protection aspect enumeration single example better than standard a hungry man)Thread-safe, efficient and lazy to load Enumeration single Examplethread safe, efficient and lazy to load (natural avoidance of reflection and deserialization)? Lazy (Static inner class of efficiency is better than standard idler) Standard lazythread safe, inefficient, lazy to load Double detec

() {4 } 5 } 6This approach is advocated by effective Java author Josh Bloch, which not only avoids multi-threaded synchronization problems, but also prevents deserialization from recreating new objects, which can be a very strong barrier, but Personally think that because of the 1.5 to join the enum characteristics, in this way to write inevitably people feel unfamiliar, in the actual work, I also rarely see someone write so. Seventh type (doub

-threading　　Both of these singleton modes are simple to implement, and there is no problem with single-threaded, but it is possible to have problems in the case of multithreading. For example, the following scenario: There is a singleton class s, thread A calls S of getinstance () to create an instance, to determine the end of instance is null but at this time be

Concept:　　Java The single case pattern is a common design pattern, there are several types of single-case pattern, here are three kinds: lazy type single case, a hungry man type single caseThe singleton mode has the following characteristics:　　1 , the Singleton class can only have one instance. 2 , The Singleton class

Singleton mode: Ensures that one object has and only one during the whole project operation.Mainly include: 1, a hungry man type; 2, lazy type.1 classSingleton1//a hungry man type2 {3 PrivateSingleton1 () {}//privatization of the construction method, not allowing the outside world to create objects4 Private Static FinalSingleton1 instance=NewSingleton1 ();5 /*A hungry man is an assignment when it's declared.6 The disadvantage is that when

Singleton ensures that a class has only one instance and provides a global access point. Those who have played counter-terrorism elites should know that there is a console in the game. We can call this console by pressing the 'key (wavy line key. The purpose of the console is to facilitate debugging by developers. Of course, we can also modify some game parameters in it. For example, input SV_GRAVITY 100 to

Singleton mode is one of 23 design patterns, about its introduction, has been countless, the general online implementation of the way is nothing but what lazy type, a hungry man type, internal class, enumeration, volatile plus double check lock and so on, today I think of a new way of realization, Using the atomic class provided by J.U.C, the code is as follows:class SingleTon { privatestaticnew AtomicRe