ReplaceAll method is not working correctly - replace regex with regex pattern

Mithrand1r :

I saw plenty of questions regarding problem with replaceAll but it didn't work for me. I would like to replace occurance of particular pattern with pattern itself (so later on I will be able to run sql and find similiar records based on regex value) by given:

https://internal-gateway.com/users/4e8a4741-dd89-4cdd-a7c3-3b2f7044e142

it shoud return

https://internal-gateway.com/users/[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89AB][0-9a-f]{3}-[0-9a-f]{12}

my code:

private final static String UUID_PATTERN = "[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89AB][0-9a-f]{3}-[0-9a-f]{12}";
private final static String SIM_NUMBER_PATTERN = "894803[0-9]{13}";
private final static String MSISDN_SHORT_PATTERN = "[0-9]{9}";
private final static String MSISDN_LONG_PATTERN = "[0-9]{11}";
private Optional<WebApp> checkRegexes(String url, Long id) {
    String urlToLookFor = url.replaceAll(UUID_PATTERN,UUID_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(SIM_NUMBER_PATTERN,SIM_NUMBER_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(MSISDN_LONG_PATTERN,MSISDN_LONG_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(MSISDN_SHORT_PATTERN,MSISDN_SHORT_PATTERN);

    return waRepository.getWebAppByRegex(urlToLookFor,id);
}

however in given example value replaceall is not replacing anything, can anyone give me a hint what is my mistake?

Ayrton :

String.replaceAll() is case-sensitive, and your pattern doesn't match your string here:

[89AB][0-9a-f]{3}: "AB" is upper case

a7c3: "a" is lower case

Just replace [89AB] with [89ab], or use a case-insensitive pattern matching method.

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