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Java设计模式之单例模式的9种方法

一. 什么是单例模式因进程需要，有时我们只需要某个类同时保留一个对象，不希望有更多对象，此时，我们则应考虑单例模式的设计。二. 单例模式的特点 1、单例模式只能有一个实例。 2、单例类必须创建自己的唯一实例。 3、单例类必须向其他对象提供这一实例。三. 单例模式VS静态类在知...

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JAVA设计模式之单例模式

概念：　　java中单例模式是一种常见的设计模式，单例模式的写法有好几种，这里主要介绍三种：懒汉式单例、饿汉式单例、登记式单例。　　单例模式有以下特点：　　1、单例类只能有一个实例。　　2、单例类必须自己创建自己的唯一实例。　　3、单例类必须给所有其他对象提供这一实例。　　单例模式确保某个类只有一个...

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