[Solved] Phone number validation regex for length and numeric values [duplicate]

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Phone number validation is an important process for any business or organization that needs to ensure that the phone numbers they are collecting are valid. A regular expression (regex) can be used to validate the length and numeric values of a phone number. This article will provide an overview of the regex used for phone number validation and provide examples of how it can be used.

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Regular expression for validating US phone numbers 8 answers

The following regex should validate phone numbers of length 10 and only contain numeric values:

^\d{10}$

Try the regular expression

^\\d{10,15}$

Here \d is a predefined character class for digits
{10, 15} quantifier stands for a repeat of 10 to 15 times of the previous pattern

Ex:

String input = "1234567890";
Pattern pattern = Pattern.compile("^\\d{10,15}$");
if (pattern.matcher(input).find()) {
    System.out.println("Valid");
}