Java regex match same length groups

Asked Oct 31 '16 at 09:48

Active Oct 31 '16 at 09:48

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I want to match strings like (()) - 2 open brackets, 2 closed brackets but not strings like ()() - open and closed and then another opens and closses (() - two opens, one closed

So more specific i want a regex like this

\({n}\){n}

n opened brackets followed by (same value for n, but n must be greedy) n closed brackets.

asked Oct 31 '16 at 09:48

Tirla Alin

1

[Demo](https://regex101.com/r/ePxoe7/1) – Wiktor Stribiżew Oct 31 '16 at 09:54
@WiktorStribiżew it's a shame it's still called regular expression... – xenteros Oct 31 '16 at 09:54
@xenteros: [You don't say so :)](http://regexstorm.net/tester?p=%5c%28%28%3f%3e%5b%5e%28%29%5d%2b%7c%28%3f%3co%3e%29%5c%28%7c%28%3f%3c-o%3e%29%5c%29%29*%28%3f%28o%29%28%3f!%29%29%5c%29&i=%28%28%29%29%0d%0a%28%28%29%0d%0a%28%29%28%29) – Wiktor Stribiżew Oct 31 '16 at 09:56
Regex should represent regular language. The above isn't regular. – xenteros Oct 31 '16 at 10:02
Thanks @WiktorStribiżew – Tirla Alin Oct 31 '16 at 17:35

Java regex match same length groups

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