Domain Name Validation Java. The javalangStringmatches method returns a boolean value which depends on the matching of the String with the regular expression. 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.
Public class DomainUtils private static Pattern pDomainNameOnly. Public class DomainValidator extends Object implements Serializable. Domain names are evaluated according to the standards RFC1034 section 3 and RFC1123 section 21.
The domain name should be between 1 and 63 characters long.
Sign - Sign of the is an important part of any email address if any email address is typed without sign this is an incorrect email address. In designing forms email plays an important role. Using OWASP validation regex. A complete domain name must have one or more subdomain names and one top-level domain name.