using regex in java for validate email

Question

I am trying to validate a certain subset of the e-mail format with regular expressions, but what I've tried so far doesn't quite work. This is my regex (Java):

boolean x = l.matches(
    "^[_A-Za-z0-9-\\\\+]+(\\\\.[_A-Za-z0-9-]+)*@\"\n" +"+ \"[A-Za-z0-9-]+(\\\\.[A-Za-z0-9]+)*(\\\\.[A-Za-z]{2,})$"
);

Thse are the conditions that the string has to match:

Mail domain is from the list:
- www.fightclub.uk
- www.fightclub.lk
- www.fightclub.sa
- www.fightclub.cc
- www.fightclub.jp
- www.fightclub.se
- www.fightclub.xy
- www.fightclub.gi
- www.fightclub.rl
- www.fightclub.ss
username has 3 to 6 characters(only lowercase English letters and numbers)

examples:

[email protected] is valid

[email protected] is invalid

..username has 3 to 6 characters(only lowercase English letters and numbers).. -> [a-z0-9]{6} will do it for you. Rest you didn't provide the information for other half. — Am_I_Helpful
– Am_I_Helpful, Commented Jul 22, 2017 at 19:12
@WiktorStribiżew i tried with it also.but i faild. can u show me correct code.i am new for this — Intern
– Intern, Commented Jul 22, 2017 at 19:14

Raman Sahasi · Accepted Answer · 2017-07-22 19:25:05Z

2

You can use:

^[a-z0-9]{3,6}@fightclub\.(?:uk|lk|sa|cc|jp|se|xy|gi|rl|ss)$

^ indicates start of string
[a-z0-9]{3,6} lowercase letters or number with length 3-6 characters
followed by @fightclub
followed by a period \.
followed by a list of domains (?: indicate that it's a non-capturing group. All your domain extensions are listed here.
$ indicates end of string

DEMO: https://regex101.com/r/rYYXYA/1

edited Jul 22, 2017 at 19:25

answered Jul 22, 2017 at 19:20

Raman Sahasi

32k9 gold badges63 silver badges74 bronze badges

Sign up to request clarification or add additional context in comments.

10 Comments

Intern Over a year ago

i got valid to [email protected] also.can u help me

Raman Sahasi Over a year ago

@Intern I missed initial ^ and last $. Check regex again now. Also check the demo.

Intern Over a year ago

no friend.i got [email protected] is valid.but should be invalid

user85421 Over a year ago

question (too lazy to check): does regex101 support Java's idiom of regular expressions?

Raman Sahasi Over a year ago

@CarlosHeuberger I haven't encountered any situation until now where it won't work with java. However, you're right, this flavour isn't mentioned officially on their website.

|

Collectives™ on Stack Overflow

using regex in java for validate email

1 Answer 1

10 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

10 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related