Question

I have:

Pattern pat = Pattern.compile("(\\d+) (\\d+) (1$)");
Matcher mat = pat.matcher(line);

with matches for:

1 2 1

but not for:

1     2     1

How can I achieve, that pattern matching is insenitive according to spaces between numbers?

Answer 1

Use \s for one space and add a + that means one ore more spaces.

"(\\d+)\\s+(\\d+)\\s+(1$)"

If you want zero or more spaces you have to use a * instead of the +.