What's a regex that matches all numbers except 1, 2 and 25?

java regex regex-negation bean-io
ktulinho picture ktulinho · Aug 28, 2014 · Viewed 16k times · Source

There's an input of Strings that are composed of only digits, i.e. integer numbers. How to write a regex that will accept all the numbers except numbers 1, 2 and 25?

I want to use this inside the record identification of BeanIO (which supports regex) to skip some records that have specific values.

I reach this point ^(1|2|25)$, but I wanted the opposite of what this matches.

Answer

Joseph Silber picture Joseph Silber · Aug 28, 2014

Not that a regex is the best tool for this, but if you insist...

Use a negative lookahead:

/^(?!(?:1|2|25)$)\d+/

See it here in action: http://regexr.com/39df2

Related questions

Negating a set of words via java regex

I would like to negate a set of words using java regex. Say, I want to negate cvs, svn, nvs, mvc. I wrote a regex which is ^[(svn|cvs|nvs|mvc)]. Some how that seems not to be working.

Read More
how to negate any regular expression in Java

I have a regular expression which I want to negate, e.g. /(.{0,4}) which String.matches returns the following "/1234" true "/12" true "/" true "" false "1234" false "/12345" false Is there a way to negate (using regx only) to the above so that the results …

Read More
How to match "any character" in regular expression?

The following should be matched: AAA123 ABCDEFGH123 XXXX123 can I do: ".*123" ?

Read More