This has the added benefit of separating singleton code from the class code leaving the flexibility to use several instances of the class or using the class as a singleton.

这样分离出单例结构的代码，将有利于保持按单例模式使用类或不按单例模式使用类的灵活性。

youdao

Those who use it will find that they often have to write the same code each time they want to create a different Singleton class.

他们会发现每次他们要创建一个不同的单例类的时候，都不得不写同样得代码。

youdao

Those who use it will find that they often have to write the same code each time they want to create a different Singleton class.

他们会发现每次他们要创建一个不同的单例类的时候，都不得不写同样得代码。

youdao