/^\w.+@\w+$/.test('rishi.21@axis') /^\w.+@\w+$/.test('shruti@PNB') /^\w.+@\w+$/.test('98765__210@upi')
public static boolean validateUPI(String upi){ final Pattern VALID_EMAIL_ADDRESS_REGEX = Pattern.compile("^(.+)@(.+)$", Pattern.CASE_INSENSITIVE); Matcher matcher = VALID_EMAIL_ADDRESS_REGEX.matcher(upi); return matcher.find(); }