Format Validation Numeric Java?

Question

I have a task to validate xml messages through Drools implementation in Java.

In a particular drool implementation I am asked to validate a field through n..5 format.

I am using regex for format checking like:

SampleText.matches("[0-9]")

For the n..5 It means the field max length is 5 'digits'? Or it means that the field has to be always 5 digits in length?

I assume that it has to do with the max length is it right?

Merry Christmas and sorry for the dumb question Thank you in advance

Your question is unclear, what exactly is `n..5`? A regex pattern? — Karol Dowbecki, Dec 25 '18 at 14:19
See https://stackoverflow.com/questions/3032593/using-explicitly-numbered-repetition-instead-of-question-mark-star-and-plus — Wiktor Stribiżew, Dec 25 '18 at 14:41

Pedro Lobito · Accepted Answer · 2018-12-25T15:50:44.157

0

To specify the exact number of characters/digits you can use {}, i.e.:

SampleText.matches("\d{5}") // matches 5 digits

edited Dec 25 '18 at 15:50

answered Dec 25 '18 at 15:43

Pedro Lobito

1

Thank you Pedro that is what I was searching for . Specification team explained the requirement of the validation in a poor way. That's exactly what I needed . Merry Christmas – user10832149 Dec 25 '18 at 15:49

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