等级Vs. SingletonClass [英] Class Vs. SingletonClass

问题描述

大家好，



普通班级与Singleton班级有什么不同？

有一个场景我被面试官问到了.......



如何将普通班级转换成单身班级...... !!!!



我在我的项目中使用过Singleton Class但是我找不到普通类和单例之间的任何区别。



任何人都可以帮忙我这个。



提前谢谢。

Hi All,

How normal class is different from Singleton class?
There is a scenario which i was asked by an interviewer.......

How will you convert normal class into a singleton class......!!!!

I have used Singleton Class in my project but i could not find any difference between normal class and singleton.

Could any one help me on this.

Thanks in advance.

推荐答案

最大的区别（确实在代码方面很漂亮）很多唯一的区别）是Singleton类没有公共构造函数：你必须通过类GetInstance方法（或类似的）来创建一个实例，因为不允许外部世界使用：

The biggest difference (indeed in code terms pretty much the only difference) is that a Singleton class does not have a public constructor: you have to go via the class GetInstance method (or similar) in order to create an instance as the outside world is not allowed to use:

MySingletonClass msc = new MySingletonClass();

必须使用

It must use

MySingletonClass msc = MySingletonClass.GetInstance();

这确保了只有一个类的实例。

Which ensures that there is only ever one instance of the class.

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