Java单例设计模式饿汉的相关内容

26、Java 简单实现单例设计模式（饿汉式和懒汉式）

一、概念 ✏️【Singleton Pattern】如果一个类被设计成单例设计模式，则在整个应用程序运行过程中，该类只能存在一个实例。二、饿汉式思考：如何实现在整个应用程序运行过程中，某个类只能存在一个实例： public class HungrySingl...

第26篇：Java 简单实现单例设计模式（饿汉式和懒汉式）

一、概念✏️【Singleton Pattern】如果一个类被设计成单例设计模式，则在整个应用程序运行过程中，该类只能存在一个实例。二、饿汉式思考：如何实现在整个应用程序运行过程中，某个类只能存在一个实例：public class HungrySingleton { // static: 保证 Hu...

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java单例设计模式——饿汉式

饿汉式（可能浪费资源，无线程安全模式）构造器私有化（防止直接new）类的内部创建对象向外暴露一个静态的公共方法。getInstance代码实现class Friends{ private String name; // 创建私有静态对象 private static Friends xm = new...

Java面试题实现单例设计模式（懒汉、饿汉）

懒汉：//懒汉，顾名思义比较懒，在用的时候才实例化 public class Singleton { //创建实例，注意，此时没有new private static volatile Singleton instance = null; //构造方法私有化，无法在外部获取实例&#...

Java面试 - 什么是单例设计模式，为什么要使用单例设计模式，如何实现单例设计模式(饿汉式和懒汉式)？

什么是单例设计模式？单例设计模式就是一种控制实例化对象个数的设计模式。为什么要使用单例设计模式？使用单例设计模式可以节省内存空间，提高性能。因为很多情况下，有些类是不需要重复产生对象的。如果重复产生对象的话，会导致大量的内存空间被占用，性能降低。例如：在程序启动中，加载已保存的数据信息。这些数...

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