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

问题描述

我有一个仅由静态成员变量和静态方法组成的类.本质上，它用作通用实用程序类.

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?

推荐答案

不，我根本不这么认为.更糟糕的做法是让一个类充满实例方法，而这些方法实际上并不依赖于特定实例.使它们静态告诉用户它们的用途.此外，您可以通过这种方式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.

作为事后的想法，总的来说，我认为避免仅仅因为"使用语言特性是好的，或者因为你认为那是Java 实现方式".我记得我的第一份工作，我有一个充满静态实用程序方法的类，一位高级程序员告诉我，通过使我的所有方法全局化"，我并没有完全利用 Java 的面向对象的力量.6 个月后，她不在团队中.

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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