Question

I’ve got a number of different string that look something like:

• 1
• 1,2
• 1 2
• 1 and 2
• 1, 2 and 3
• 1, 93

So thats:
– single numbers (potentially multiple digits)
– sequences seperated by ‘and’, commas or spaces

I’d like to write a Reg Ex to pull back just the numeric bits of the string. I had thought something like this would work:

Pattern.compile("^(?:(\\d+)[^\\d]+)*$");

The idea being that it should match and capture sequences of digits, skip multiple non-digits characters and repeat

Answer 1

Are you not just doing a match on digits here?:

    String str = "1, 2 and 3, 93";

    Matcher m = Pattern.compile("\\d+").matcher(str);
    while (m.find()) {
        System.out.println(m.group(0));
    }