Java Regex specify length

Question

Please find below the regex I am using for validating an email address. This is working fine.

^[-!#$%&\\'*+\\\\./<MORE_REGEX_HERE>^_`a-z{|}~]+$

Now I want to add a length check in this regex for example the email address can be of max length 60. So I tried something like below

^([-!#$%&\\'*+\\\\./<MORE_REGEX_HERE>^_`a-z{|}~]+){1,60}$

But its not working. Any thoughts?

In addition to your original regex, you could check for the length ^.{,60}$. — devnull
– devnull, Commented Jan 7, 2014 at 6:43
@RafaEl - You mean in UI right that is already there but I want to re verify in backend. — A Paul
– A Paul, Commented Jan 7, 2014 at 6:46

user3115056 · Accepted Answer · 2014-01-09 13:06:13Z

2

Hey you can find the below solution if it works:-

It might be so that you are having multiple matching strings within a single -

^[-!#$%&\'*+\\.]+[^_`a-z{|}~]+$

in such cases you cannot use ^[-!#$%&\'*+\\.]+[^_`a-z{|}~]{1,60}$

to match the whole string but it matches only the second part of the string in such cases you need to use the below regex: -

[^[-!#$%&\\'*+\\\\.]+[<MORE_REGEX_HERE>^_`a-z{|}~]+$]{1,60}

Try it should work now.

answered Jan 9, 2014 at 13:06

user3115056

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2 Comments

Toto Over a year ago

Did you really try it?

user3115056 Over a year ago

Yes I did using a different regex and number.

Community · Accepted Answer · 2017-05-23 12:23:27Z

0

If you want a valid way of validating emails try this: Good solution

Using {n,m} matches n(minimum inclusive) to m (maximum inclusive) characters.

edited May 23, 2017 at 12:23

CommunityBot

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answered Jan 7, 2014 at 7:33

AlfredoVR

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Comments

Toto · Accepted Answer · 2014-01-09 13:10:43Z

0

Use a lookahead assertion:

^(?=[-!#$%&\\'*+\\\\./<MORE_REGEX_HERE>^_`a-z{|}~]+).{1,60}$

answered Jan 9, 2014 at 13:10

Toto

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