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    Regular expression for validating email address

    ~ characters are legal in the local part of an e-mail address but in the above regular expression those characters are filtered out. It begins with at least one or more word characters including the underscore, equivalent to [A-Za-z0-9_]. Email validation using regular expressions is common task which may be required in any application which seek email address as required information in registration step.methods to match a string to be a valid email address based on the given regex.This examples also demonstrate the power of regular expression to validate an email address.

    With that said, there might be cases when you cannot use those modules and you'd like to implement your own solution using regular expressions.

    There may be more usecase but that’s not point of discussion here. validating email address in java using regular expressions.

    List emails = new Array List(); emails.add("[email protected]"); emails.add("[email protected]"); emails.add("[email protected]"); emails.add("[email protected]"); emails.add("user#@in"); emails.add("[email protected]"); //Invalid emails emails.add("user#domain.com"); emails.add("@yahoo.com"); String regex = "^(. )$"; Pattern pattern = Pattern.compile(regex); for(String email : emails) Output: [email protected]: true [email protected] : true [email protected]: true [email protected]: true user#@in : true [email protected] : true user#: false @: false In this regex, we have added some restriction osn username part of email address.

    Email:: Address can be used to extract a list of e-mail addresses from a given string.

    For example: examples/email_It properly verifies if an e-mail is valid, it even removes unnecessary white-spaces from both ends of the e-mail address, but it cannot really verify if the given e-mail address is really the address of someone, and if that someone is the same person who typed it in, in a registration form.

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