publicclassSingleton{publicclassInstanceFactory{privatestaticclassInstanceHolder{publicstaticInstanceinstance=newInstance(); }publicstaticInstancegetInstance(){returnInstanceHolder.instance ;// 这里将导致 InstanceHolder 类被初始化 (只有第一次调用getInstance方法的时候,虚拟机加载InstanceHolder并且初始化instance)} } ...
publicclassLazyInitSingleton {privatestaticLazyInitSingleton SINGLE_INSTANCE =null;//私有化构造器privateLazyInitSingleton() {}//构造实例,加入synchronized关键字publicstaticsynchronizedLazyInitSingleton getInstance() {if(SINGLE_INSTANCE ==null) { SINGLE_INSTANCE=newLazyInitSingleton();//判断未构造后再构造}re...
publicclassSingleton{privatefinalstaticSingletonINSTANCE=newSingleton();privateSingleton(){}publicstaticSingletongetInstance(){returnINSTANCE;}} 3、饿汉式(静态代码块) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicclassSingleton{privatestaticSingleton instance;static{instance=newSingleton();}privateSin...
using System;using System.Threading;namespace Singleton{ // This Singleton implementation is called "double check lock". It is safe // in multithreaded environment and provides lazy initialization for the // Singleton object. class Singleton { private Singleton() { } private static Singleton _inst...
public class PrototypeBean { private String name; public PrototypeBean(String name) { this.name = name; logger.info("Prototype instance " + name + " created"); } //... } Next, we’ll inject a bean factory into our singleton bean by making use of the java.util.Function interface: pu...
我们直接通过Singleton.Instance.xxxx就可以方便的调用指定的方法了,在C#中,可以将Instance设置为属性,这样连()都不需要了 这是最简单的单例模式的代码,但这种写法非常的糟糕,下面会说明原因。 难道单例设计模式只有这一点儿可讲吗? 如果涉及到多线程,就需要处理同步的问题,并且在实际应用中,很常见,只要涉及到网络...
“return result;” instead of “return instance;”). This can improve the method’s overall performance by as much as 25 percent. If you think there are better ways to achieve this or if the thread-safety is compromised in the above implementation, please comment and share it with all of...
sealed class Singleton { private Singleton() { } public static readonly Singleton TheInstance = new Singleton(); } As in C++, you can use a private constructor to prevent programmers from creating instances of Singleton. To prohibit inheritance, declare your class sealed. (In...
INSTANCE } 第三种:静态代码块饿汉式(适合复杂实例化) packageorg.example.singleton;importjava.io.IOException;importjava.util.Properties;/** * 饿汉式:直接创建实例对象,不管是否需要这个对象都会创建实例。 */publicclassSingleton3{publicstaticfinalSingleton3 INSTANCE;privateString info;static{Propertiesprop=new...
(); public static AuxiliaryToolSingleton Instance = new AuxiliaryToolSingleton(); private AuxiliaryToolSingleton() { RegistorOperator(OperatorFactory.Instance); } public void CallOperator(string operatorName, params string[] operatorParams) { //OperatorSemaphore.WaitOne(); lock (OperatorLock) { ...