July 2017
Beginner to intermediate
715 pages
17h 3m
English
Content preview from Java: Data Science Made Easy
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Validating e-mail addresses
It is also common to need to validate e-mail addresses. While most e-mail addresses have the @ symbol and require at least one period after the symbol, there are many variations. Consider that each of the following examples can be valid e-mail addresses:
- myemail@mail.com
- MyEmail@some.mail.com
- My.Email.123!@mail.net
One option is to use regular expressions to attempt to capture all allowable e-mail addresses. Notice that the regular expression used in the method that follows is very long and complex. This can make it easy to make mistakes, miss valid e-mail addresses, or accept invalid addresses as valid. But a carefully crafted regular expression can be a very powerful tool.
We use the Pattern and Matcher classes ...