How can I trim beginning and ending double quotes from a string?

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You can use String#replaceAll() with a pattern of ^\"|\"$ for this.

E.g.

string = string.replaceAll("^\"|\"$", "");

To learn more about regular expressions, have al ook at http://regular-expression.info.

That said, this smells a bit like that you’re trying to invent a CSV parser. If so, I’d suggest to look around for existing libraries, such as OpenCSV.

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