Is making an empty string constant worth it?

I have a co-worker that swears by //in a singleton "Constants" class public static final String EMPTY_STRING = ""; in a constants class available throughout the project. That way, we can write something like if (Constants.EMPTY_STRING.equals(otherString)) { ... } instead of if ("".equals(otherString)) { ... } I say it's 1. not worth it--it doesn't save any space in the heap/stack/string pool, 2. ugly 3. abuse of a constants class. Who is the idiot here?
a cow orker? How does one ork cows? =)

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