CODEWITHSUNDEEP
regexphone-number
user1006072
user1006072

Reputation: 963

A typical regex for phone number validation in Java

I am struggling with getting the right regex for a phone number validation in my application. I have got a regex that will accept only numbers and some special symbols like ()- etc, however, the problem is that it accepts only symbols as well. So for example, it would accept something like ()()()(). I want to modify the regex or get a whole new regex that accepts these symbols but it should have at least one number before and after each symbol.

My requirements are:

  1. Only numbers
  2. Number with combination of special symbols
  3. Each symbol should be followed by a number (before and after) but white spaces are okay
  4. Max length should be 15

Upvotes: 1

Views: 837

Answers (1)

Paul Jackson
Paul Jackson

Reputation: 2147

In my experience, the parenthesis only appear around the first group of digits and there are never fewer than 3 digits in a group. This regex does that, and prevents multiple consecutive separators with the exception of a space following a paren "(123) 456-7890". I also added support for periods as separators. It allows for 1, 2, or 3 groups of numbers and attempts to enforce an overall range of 7-15 digits but it errs on the permissive side. 

^\\s*(\\d{7,15})||(\\d{3,12}[\\-.]?\\s?\\d{3,12}[\\-.\\s]?)||([(]?\\d{3,9}[)\\-.]?\\s?\\d{3,9}[\\-.\\s]?\\d{3,9})\\s*

In my environment I have to escape the backslashes - you may not have to so you may need to replace the \ with . The hyphen must be escaped because in this context it represents a range.

Upvotes: 1

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