Crashcourse Regex

[marcel.m.vielsack.cluetec.de]

Hi!

I'm validating an input with the @Pattern annotation and want my regex to match patterns like this:

1.0, 1, 1.25, 12.45

and I built this regex:

(^[0-9]+.?[0-9]*$)

But the validation fails ... :(

Does anybody know why the validation fails?

Cheers Marcel

[swd847]

try:


\d+(\.\d+)?


\d+ : matches one or more digits
the brackets with the question mark make the decimal point part optional
\. matches a . ( just a . matches any character)

[marcel.m.vielsack.cluetec.de]

Thanks for the answer, Stuart!

I tried the regex you suggested, but seam still tells me that the regex does not match.
I also tried a simpler regex ("\d*") and typed only integer values in my inputfield.

in my source file it looks like this;

  @Pattern(regex = "\\d*")
  @Range(min = 0)
  private Double amount;

Is there maybe a problem because I'm trying to validate a Double with a regex?