CODEWITHSUNDEEP
regex
Aaron
Aaron

Reputation: 2755

Regex : Match digits with hyphens and white spaces only

I'm trying to match digits with at least 5 characters (for the whole string) connected by a hyphen or space (like a bank account number).

e.g

"12345-62436-223434"

"12345 6789 123232"

I should also be able to match

"123-4567-890"

The current pattern I'm using is (\d[\s-]*){5,}[\W]

But i'm getting these problems.

  1. When I do this, I match all the white spaces after matching digits with at least 5 digit-characters

  2. I'm going to replace this so I only want to match digits, not the white-spaces and hypens.

    When I get the match what I want to do is to mask it like the one below.

from "12345-67890-11121" to "*****-*****-*****"

or

from "12345 67890 11121" to "***** ***** *****"

My only problem is that I don't get to match it like what I want to.

Thanks!

Upvotes: 2

Views: 3924

Answers (3)

Tim Biegeleisen
Tim Biegeleisen

Reputation: 521389

One option here is to take your existing pattern, and then add a positive lookahead which asserts that there are seven or more characters in the pattern. Assuming that there are two spaces or dashes in the account number, this will guarantee that there are five or more digits.

You can try using the following regex:

^(?=.{7,}$)((\\d+ \\d+ \\d+)|(\\d+-\\d+-\\d+))$

Test code:

String input = "123-4567-890";
boolean match = input.matches("^(?=.{7,}$)((\\d+ \\d+ \\d+)|(\\d+-\\d+-\\d+))$");
if (match) {
    System.out.println("Match!");
}

If you need to first fish out the account numbers from a larger document/source, then do so and afterwards you can apply the regex logic above.

Upvotes: 1

Anmol Singh Jaggi
Anmol Singh Jaggi

Reputation: 8576

Maybe you want something like this:

(\d{5,})(?:-|\s)(\d{5,})(?:-|\s)(\d{5,})

Demo

EDIT:

(\d+)(?:-|\s)(\d+)(?:-|\s)(\d+)

Demo

Upvotes: 2

Jan
Jan

Reputation: 43169

This one might work for you (probably some false-positives, though):

\d[ \d-]{3,}\d

See a demo on regex101.com.

Upvotes: 2

Related Questions