Java regex - expression with exactly one whitespace

Question

I want to match all expressions with exactly one whitespace. Currently, I\'m using [^\\\\s]*\\\\s[^\\\\s]*. That doesn\'t seem like a very good way, though.

Answer 1

You could also check it with indexOf:

String s = "some text";
int indexOf = s.indexOf(' ');
boolean isOneWhitespace = (indexOf >= 0 && indexOf == s.lastIndexOf(' '));