Java – regular expressions match 17 uppercase characters

2020-08-21 • Java

In Java, which regex is more suitable for matching strings with a length of 17 characters? All strings are capitalized and do not include the letters I (I), O (o) or Q (q)

I've tried the following, but it still matches I, O and Q, even greater than or equal to 17

^[A-Z]+

How can I improve?

Solution

^(?!.*(?:[IOQ]))[A-Z]{17}$

^(?!.*(?:[IOQ]))[A-Z]{17}$

Just add a look ahead See demo

https://regex101.com/r/uF4oY4/24

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Java