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I recently was introduced to a large codebase and noticed all string comparisons are done using String.Equals() instead of ==
What's the reason for this, do you think?
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The main difference between the . equals() method and == operator is that one is a method, and the other is the operator. We can use == operators for reference comparison (address comparison) and . equals() method for content comparison.
In String, the == operator is used to comparing the reference of the given strings, depending on if they are referring to the same objects. When you compare two strings using == operator, it will return true if the string variables are pointing toward the same java object. Otherwise, it will return false .
Specifically with regard to strings, yes, == is slightly faster than equals , because the first thing the String.
The String class compareTo() method compares values lexicographically and returns an integer value that describes if first string is less than, equal to or greater than second string. Suppose s1 and s2 are two String objects. If: s1 == s2 : The method returns 0.
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.
In C# there's no (practical) difference (for strings) as long as they are typed as string.
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.
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