如果私有辅助方法可以是静态的，它们是否应该是静态的 [英] Should private helper methods be static if they can be static

问题描述

假设我有一个旨在实例化的类.我在类中有几个私有的帮助器"方法，它们不需要访问任何类成员，只对它们的参数进行操作，返回结果.

Let's say I have a class designed to be instantiated. I have several private "helper" methods inside the class that do not require access to any of the class members, and operate solely on their arguments, returning a result.

public class Example {
   private Something member;

   public double compute() {
       double total = 0;
       total += computeOne(member);
       total += computeMore(member);
       return total;         
   }

   private double computeOne(Something arg) { ... }
   private double computeMore(Something arg) {... } 
} 

是否有任何特别的理由将 computeOne 和 computeMore 指定为静态方法 - 或者有什么特别的理由不这样做?

Is there any particular reason to specify computeOne and computeMore as static methods - or any particular reason not to?

让它们保持非静态当然是最容易的，即使它们当然可以是静态的而不会造成任何问题.

It is certainly easiest to leave them as non-static, even though they could certainly be static without causing any problems.

推荐答案

我更喜欢这样的辅助方法 private static;这将使读者清楚他们不会修改对象的状态.我的 IDE 还会以斜体显示对静态方法的调用，因此我无需查看签名就知道该方法是静态的.

I prefer such helper methods to be private static; which will make it clear to the reader that they will not modify the state of the object. My IDE will also show calls to static methods in italics, so I will know the method is static without looking the signature.

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