java singleton example

to 100000, and the number of runs.Related notes: The heap is where all the objects live and the stacks be where the threads do their w Ork. Each thread have its own stack and can ' t access each others stacks.　Each thread also have a pointer into the code which points to the bit of code they ' re currently running. strings is immutable (cannot being changed) so we ' re safe if the-the only Obje CT being "shared". So many threads can is running the same method. They might not being running

Transferred from: http://blog.csdn.net/jason0539/article/details/23297037In Java, the singleton pattern is a common design pattern, the single-case pattern has a variety of ways, here are mainly only: lazy type single case, a hungry man type single case　　Singleton mode ensures that a class has only one instance, and instantiates itself and provides this instance

Write in frontThere are 23 types of Java design patterns, although I don't count them carefully. Singleton mode, as if it is necessary in common Java projects, such as rice is absolutely indispensable to rice, no problem. Here's your understanding, broadly divided into several areas:1. When you need to use a singleton

PublicString toString () {return"Person [name=" + name + ", age=" + Age + "]"; }}A method for serializing and deserializing is then given: Public Static voidMain (string[] args)throwsException {person P1=NewPerson (); P1.setname ("Bruce Min"); P1.setage (25); System.out.println ("P1:" +p1.tostring ()); /**Serialization of*/Bytearrayoutputstream byteout=NewBytearrayoutputstream (); ObjectOutputStream objout=NewObjectOutputStream (byteout); Objout.writeobject (p1); /**deseriali

Sometimes in the actual project development, we encounter a situation where the class only allows an instantiated object, does not allow more than one instantiation object, we refer to this situation as a singleton pattern in the Java design pattern. The design of the singleton mode mainly uses the Java private and sta

实例 publicstaticgetInstance() { return INSTANCE; }}The direct initialization of a static instance guarantees thread safety, but this is not lazy loading, and the singleton is initialized at the outset and cannot be initialized when we need it.Lazy-loading//实例在这个方法第一次被调用的时候进行初始化publicstaticsynchronizedgetInstance() { ifnull) { newSingleton(); } return instance;}getInstance()Method is set to synchronized ensure thread safety,

Php Singleton mode entry example Class mysql { Privete static $ instance; // Save the instance // The constructor declares private to prevent direct object creation. Privete function _ construct (){ // Instantiate } // Singleton method, which determines whether the instance has been instantiated and i

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespacewindowsformsapplication5{classClass1 {Private StaticClass1 minstance; //Thread Helper Objects Private Static ReadOnly ObjectLockassistant =New Object(); /// ///Single Case/// /// Public StaticClass1 Instance {Get { if(Minstance = =NULL) { Lock(lockassistant) {if(Minstance = =NULL) {minstance=NewClass1 (); }

1. Definition of a singleton patternSingleton mode ensures that a class has only one instance, and instantiates itself and provides this instance to the entire system.2. Characteristics of the Singleton modeA singleton class can have only one instance.The Singleton class must create its own unique instance.The

In the 23 design modes of GOF, the singleton mode is a relatively simple one. However, sometimes the simpler things become more prone to problems.The following is a detailed discussion of the single-instance design pattern. The so-called singleton mode, simply put, is to ensure that only one instance of a class exists throughout the application. It is like application in the

Java design mode -- Singleton mode and java design mode --The Singleton mode, as its name implies, ensures that only one instance is allowed for a class in the program. This class can create a unique instance and only provide this unique instance to the system. Generally, there are five

The recent use of sonar to evaluate the quality of the code, found a problem, project in some of the Util class, the static method has been written to suggest the best way to use a single case to correct.To this end, I thought carefully, found that there is very reasonable. Here's my personal understanding of the static method and the singleton pattern.The so-called singleton mode, I do not explain too much

I. Hunger examples Copy codeThe Code is as follows: public class Singleton { Private Singleton (){ } Private static Singleton instance = new Singleton (); Private static Singleton getInstance (){Return instance;}} Features: The hungry Chinese style is instantiated in advan

Original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be investigated. http://devbean.blog.51cto.com/448512/203501 in the 23 design modes of GOF, the singleton mode is a relatively simple one. However, sometimes the simpler things become more prone to problems.The following is a detailed discussion of the single-insta

if(single =NULL) { OneSingle =NewSingle (); A } - returnSingle ; - } the}Below we explain that lazy thread is unsafe, usually we recommend writing a hungry man, because it is thread-safe.When multi-threaded access to lazy-type, because of the lazy way of the common data in the operation of multiple statements.Two threads, line Cheng and line Cheng call the GetInstance method at the same time, when thread 1 executes the If judgment, single is empty, there is no time t

facilitate the control of the pool thread.5), the Website Statistics class information, generally also uses the singleton pattern, otherwise difficult synchronization control, for example statistics my blog's visit quantity.6), we develop the application of the log function is also used in the singleton mode, because we can only have one instance to append log i

Example of a singleton class in PHP This article mainly introduces the example of a single instance of PHP, this article directly gives code examples, the need for friends can refer to the following The single-instance class in PHP is useful for exchanging data and saving memory. Write a simple example. Class 1, the s

Singleton There can be only one instance; You must create your own instance; this instance must be provided to all other objects Implementation method A hungry man type singleton Pre-loading method Class Single { private single () { System.out.println ("OK"); } private static Single Instance = new single (); public static single getinstance () { return instance; }}

not present, return object references, initialize the sequence, This makes double detection really work.Of course, you can also choose not to use dual detection, and non-lazy loading to achieve the same effect: 1 class singleton{ 2 private static Singleton Singleton = new Singleton (); 3 private

Java implementation of the Singleton mode of four methods and some characteristics, the need for friends can refer to One, a hungry man type single case classCopy CodeThe code is as follows:public class Singleton{Private Singleton () {}private static Singleton instance = ne