Email Address using java regular expression

[nav katoch]

Hi all,

I am starting a new thread as the same thread is old enough. I have a requirement to validate another email addresses. I am using the following pattern to validate my email address which is working for most of the email addresses:-
static String EMAIL_MATCH_REG = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";.

I want a pattern for these emails 1) !#$%%^&*()[e-mail], 2) [e-mail], not allowed _before @ symbol, and 3) [e-mail]_.net, subdomains should not allow end with a special character and must be with 2 - 4 characters.

Please guide me.

Thank you so much,

Naveen Katoch

[Henry Wong]

nav katoch wrote:Hi all,

I am starting a new thread as the same thread is old enough. I have a requirement to validate another email addresses. I am using the following pattern to validate my email address which is working for most of the email addresses:-
static String EMAIL_MATCH_REG = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";.

I want a pattern for these emails 1) !#$%%^&*()[e-mail], 2) [e-mail], not allowed _before @ symbol, and 3) [e-mail]_.net, subdomains should not allow end with a special character and must be with 2 - 4 characters.

Please guide me.

Thank you so much,

Naveen Katoch

Your current regex is almost 90% there. And your three new requirements could be added one at a time. Why don't you take a shot at doing the first one? .... what issue is currently stopping you?

Henry

[nav katoch]

Hi Henry,

I have fixed the first one with this public static String EMAIL_ADDRESS_VALIDATION_REGEX = "^[_A-Za-z0-9-[!#$%^&*()+]]+(\\.[_A-Za-z0-9-\\\\\"\\s]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$"; but not able to fixe the seond and third yet. Please guide.
Thanks,
Naveen Katoch

[Aniruddh Joshi]

I was trying the same 2-3 years back and after some days of research found there is no perfect regex to validate an email address.
Different countries have different patterns.
I finally ended up using Apache commons validator and no tester, product owner or user complained against the validations.