一个类只有静态字段和方法是坏的做法吗？ [英] Is it bad practice for a class to have only static fields and methods?

问题描述

我有一个只包含的静态成员变量和静态方法的类。

I have a class that consists only of static member variables and static methods. Essentially, it is serving as a general-purpose utility class.

一个类只包含静态成员变量和静态方法是不好的做法吗？ strong>

Is it bad practice for a class to contain only static member variables and static methods?

推荐答案

不，我不这么认为。更糟糕的做法是拥有一个充满实例方法的类，它实际上不依赖于特定的实例。使它们静态，告诉用户他们打算如何使用。此外，您可以避免不必要的实例化。

No, I don't think so at all. It is worse practice to have a class full of instance methods which don't actually depend on a particular instance. Making them static tells the user exactly how they are intended to be used. Additionally, you avoid unnecessary instantiations this way.

编辑：作为一个事后，一般来说，我认为它很好避免使用语言功能只是因为那就是Java做的方式。我记得我的第一份工作，我有一个充满了静态实用程序方法和一个高级程序员告诉我，我没有充分利用Java的OO力量，使我的所有方法全局。她6个月后不在球队。

As an afterthought, in general I think its nice to avoid using language features "just because", or because you think that that is the "Java way to do it". I recall my first job where I had a class full of static utility methods and one of the senior programmers told me that I wasn't fully harnessing the OO power of Java by making all of my methods "global". She was not on the team 6 months later.

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