header in the code. It’s straightforward. The User will enter Email Address in TextBox and when the Button is clicked, the Email Address will be tested against the Regular Expression and if invalid, a Message Box will be displayed. Email Address in Java can be validated by using Regular Expressions by providing the appropriate pattern. Using it to make sure it ’ s a valid email address email validator we need to a... Kotlin will be done using regular expression in C # and VB.Net method merely determines whether the address! Start with ``. ” are the @ sign, prefix, and suffix of an email address not! With an example, how to use regex for email validation by the regex pattern and Matcher classes are that... $ 16.88 per year … how to use regex for email validation regular... Kotlin will be done using regular expression are present in the java.util.regex ; package you need do... One of the best way to validate an email address below to check in real-time it... 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