Regular Expression to Match Non-Whitespace Characters

Question

I need to make a regular expression that matches something like:

JG2144-141/hello

or

!

but not:

Answer 1

The \S in [A-Za-z0-9-!/\S] makes this character class equal to \S, but you want to make sure all chars in the string are non-whitespace chars. That is why you should wrap the pattern with ^ and $ anchors and add a + quantifier after \S to match 1 or more occurrences of this subpattern.

You may use

^\S+$

See the regex demo

Details

• ^ - start of string
• \S+ - 1 or more non-whitespace chars
• $ - end of string.