Pattern.quote(“pattern”) returns \Qpattern\E. Is it really necessary to literalize a string if there is no meta character in it?
Pattern.quote(pattern) returns \Qpattern\E . Is it really necessary to literalize a string if there
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Pattern.quote(“pattern”) returns \Qpattern\E. Is it really necessary to literalize a string if there is no meta character in it?
No, it’s not necessary, but that’s what the implementer chose to do, probably to simplify the implementation and because the cost of the unnecessary
\Qand\Eis rather small.In my JDK, the only thing that
Pattern.quote()cares about is whether there are already\Qand\Ein the pattern. It doesn’t look for any other special characters.