为什么要在 == 上使用 String.Equals? [英] Why would you use String.Equals over ==?

问题描述

我最近接触了一个大型代码库，并注意到所有字符串比较都是使用 String.Equals() 而不是 ==

I recently was introduced to a large codebase and noticed all string comparisons are done using String.Equals() instead of ==

你认为这是什么原因?

推荐答案

很可能大部分开发人员都来自 Java 背景，其中使用 == 比较字符串是错误的并且不起作用.

It's entirely likely that a large portion of the developer base comes from a Java background where using == to compare strings is wrong and doesn't work.

在 C# 中(对于字符串)没有(实际的)区别，只要它们被输入为字符串即可.

In C# there's no (practical) difference (for strings) as long as they are typed as string.

如果它们被输入为 object 或 T，那么请在此处查看讨论泛型方法或运算符重载的其他答案，因为在那里您肯定想使用 Equals 方法.

If they are typed as object or T then see other answers here that talk about generic methods or operator overloading as there you definitely want to use the Equals method.

这篇关于为什么要在 == 上使用 String.Equals?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！