Regular expression for validating email address
Email format: The regular expression for email is : Finally, the email address must end with two to four alphabets.
Having a-z and A-Z means that both lowercase and uppercase letters are allowed.
In this article, we will see how we can validate an Email address provided by the user in Java. You'd be surprised at some examples of valid e-mail addresses. As an additional example, see the "almost RFC 822 compatible regex" in this answer. Email Address in Java can be validated by using Regular Expressions by providing the appropriate pattern. For this, the Pattern and Matcher classes are used that are present in the regex; package.
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The format for a valid Email Address is as follows: Lets breakdown the above expression to understand it 1. ^.-] Here ^ – Indicates start of the string where the characters can be anywhere between a-z A-Z digits 0-9 and some allowed special symbols like ‘_’ ‘#’ ‘?