Match Validate User Input Via Regex Comparison?

I am trying to match validate user input via regex comparison. But i fail to do so.

The string that will be inserted will have the following pattern: "digit/s " and it can be repeated a random number of times.

The program will extend to characters in the future but for now i am struggling with digits.

i am using a StringBuilder to build the regex string. Or maybe i could use something else but so far i didn't make it.

So far i have this regex

Java Code: "(d+s+)+" mh_sh_highlight_all('java');

The problem is that the newline character will interfere with the last number.

So if i enter

Java Code: "3 4 555" mh_sh_highlight_all('java');

- it will not match. And the regex will only see 3 4.

But if i enter

Java Code: "3 4 555 " mh_sh_highlight_all('java');

- with an extra space at the end it works. Obviously that is not the desired case.

I did find a workaround, but i fear it is somewhat broken

I changed to

Java Code: "(d+s*)+" mh_sh_highlight_all('java');

But in this case the pattern should see 3 4 5 5 5 as the regular expression. Am i correct?

I also tried some other variants but none of them worked:

Java Code: "d+(s+|
*)" mh_sh_highlight_all('java');

Or i could do something like

Java Code: "(d+s){" + i + "}" mh_sh_highlight_all('java');

- where i is the number of values i enter.

Am i on the right track here? What am i forgetting?