Regex to match String containing at least one digit and one number with specific length

Well, there are million of questions with similiar topic - I have every single response in them but with no success

I have set of urls:

https://test-gateway.com/newUserCustomerOrder
https://test-gateway.com/newUserCustomerOrder/5e8f39ee5bd0920012e40a13
https://test-gateway.com/newUserCustomerOrder/5e8f39f65bd0920012e40a14
https://test-gateway.com/newUserCustomerOrder/5e8f3a045bd0920012e40a15
https://test-gateway.com/newUserCustomerOrder/5e8fd4755bd0920012e411fd
https://test-gateway.com/newUserCustomerOrder/5e8fd4e35bd0920012e4120b
https://test-gateway.com/newUserCustomerOrder/5e8fd4eb5bd0920012e4120d

I would like to find orderIds (they will appear in random place inside of this url for particular scenarios)
regex like:

(?=.*\d)[a-zA-Z\d]{18,24}

Unfortunately catch both id 5e8f39ee5bd0920012e40a13 and adapter name newUserCustomerOrder
I would like to be able to catch each string with length in range {18,24} which contains at least one digit.

Could anyone give me a hint how to make it work?

Try using the following regex pattern:

\b(?=[^/]*\d)\w{18,24}\b

<h2>Demo</h2>

Explanation of regex:

\b           match a word boundary (most likely /)
(?=[^/]*\d)  then assert that a digit follows in the next segment of the URL,
             without passing /
\w{18,24}    match 18 to 24 word characters
\b           match another word boundary

Here is a one-liner in Java using this regex:

String url = "https://test-gateway.com/newUserCustomerOrder/5e8f39f65bd0920012e40a14";
String orderId = url.replaceAll(".*\\b((?=[^/]*\\d)\\w{18,24})\\b.*", "$1");
System.out.println(orderId);

This prints:

5e8f39f65bd0920012e40a14

Rather than looking ahead for .*\d, lookahead for word characters followed by \d, thus excluding the newUserCustomerOrder/ since it contains a slash:

(?=\w*\d)[a-zA-Z\d]{18,24}

https://regex101.com/r/GLrhNd/1

You may use this regex:

(?=[^/]*\d)([a-zA-Z\d]{18,24})

RegEx Demo

(?=[^/]*\d) is positive lookahead to assert presence of digit following 0 or more non-/ characters.