best regular expression for validating email addresses? - What is the

Maybe you're wondering why there's no "official" fool-proof regex to match email addresses. Well, there is an official definition, but it's hardly fool-proof.
The official standard is known as RFC 2822. It describes the syntax that valid email addresses must adhere to. You can (but you shouldn't--read on) implement it with this regular expression:
(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])



Java program for regex



import java.util.regex.*;
 
class regexSample 
{
public static void main(String args[]) 
{
//Input the string for validation
String email = "xyz@hotmail.com";
 
//Set the email pattern string
Pattern p = Pattern.compile(" (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"
         +"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")"
            + "@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\]");
 
//Match the given string with the pattern
Matcher m = p.matcher(email);
 
//check whether match is found 
boolean matchFound = m.matches();
 
if (matchFound)
System.out.println("Valid Email Id.");
else
System.out.println("Invalid Email Id.");
}
}

http://stackoverflow.com/questions/201323/what-is-the-best-regular-expression-for-validating-email-addresses/4554294#4554294

14 comments:

  1. Often times, womens vests have pockets and can be pulled over any kind of outfit.
    From promotional proceedings to commercial days out; there have never been so numerous cases to acquire exclusive overstated and printed polos shirts.
    The brand has sustained the time testing any brand goes through over the decades
    thanks to mouth-publicity it receives.

    my blog ... sweater korea

    ReplyDelete
  2. It requires a lot of effort to break this habit of nail biting.
    That previous British maxim states that 'Knowing your enemy is battle 50 % won'.

    According to Web - Md males tend to bite their nails more than women.


    Here is my web blog: Howtostopnailbiting.webs.com

    ReplyDelete
  3. Apparently, the duct tape, or any other tape, suffocates the
    wart as it cuts off oxygen and alloww the body's immune system to kill the wart. In order to reassure yourself that your moles are safe from cancer, you would have to reinforces your observation by a doctor's diagnosis.
    Extended hair can cause your physique pimples to get worse if you do not wash it typically, and make confident that it is genuinely cleanse.


    Feel free to surf to my webpage How to remove skin tags

    ReplyDelete
  4. These oils have been tested and proven to be effective against a variety of
    warts. In order to reassure yourself that your moles are safe from cancer, you would have to reinforces your observation by
    a doctor's diagnosis. The essence of natural mole removal is the use of herb and folk remedies.

    my webpage :: Skin tag Removal

    ReplyDelete
  5. I have spoke with traders who merely want to "do a deal" with a particular guru.
    Just give them the price you want to pay for the house minus
    6% - 7% and if they ask how high you are willing to go, tell them that's it. Property - Hookp takes uses advanced link building and promotion tools to optimize your profile for search engine ranking.

    my blog post; hae vuokra-asuntoa

    ReplyDelete
  6. Hello! Dο you κnow if they mаke аny plugіns tо safeguarԁ
    аgainst hackerѕ? I'm kinda paranoid about losing everything I've wοrkеԁ hard on.
    Any suggeѕtiοnѕ?

    my wеbsіte :: docs.phpbarcelona.org

    ReplyDelete
  7. Frank Marino: 'This stuff was invented by Circus Magazine and Creem Magazine. Chances are, you will have already started your own style that will stun your audience. The notes in this first scale are E, G, A, B, and D.

    My page how to play bass guitar

    ReplyDelete
  8. Hello there! This is my first comment here so I just wanted to give a quick shout out and
    say I genuinely enjoy reading through your
    posts. Can you suggest any other blogs/websites/forums that go over the same subjects?
    Thank you!

    Take a look at my homepage Jackpot 6000 (http://Ruh2.com/index.php?do=/KellyTimm/Info/)

    ReplyDelete
  9. With havin so much content and articles do you ever run into any problems of plagorism or copyright
    infringement? My blog has a lot of unique content I've either created myself or outsourced but it
    seems a lot of it is popping it up all over the web without my agreement.

    Do you know any solutions to help prevent content from being stolen?

    I'd truly appreciate it.

    Feel free to visit my web blog; คิ้วสามมิติ

    ReplyDelete
  10. Hi! Tɦis is the fourth timе visiting now and Ӏ just wanted to say I tгuley fancy looking at
    yߋur web site. Ӏ've decided to bookmark it аt stumbleupon.com with your title:
    Blogger: Javɑ Android Tutorials and youг Domain name:
    https://www.blogger.com/comment.g?postID=6471598883453102769&blogID=9110095312440638833. I hope
    this is okay with you, I'm trying to give youг ѡonderful blog a bit more coverage.
    Be bаck soon.

    my web blog Camaro Performance Parts

    ReplyDelete
  11. Simply wish to say your article is as amazing.

    The clearness in your put up is simply nice and i could think you are knowledgeable on this subject.
    Fine with your permission let me to seize your feed to stay updated with coming near near post.
    Thanks 1,000,000 and please carry on the gratifying work.


    Also visit my site :: castleville legends hack tool

    ReplyDelete
  12. I absolutely love your blog and find nearly all of your post's to
    be exactly I'm looking for. Do you offer guest writers to
    write content to suit your needs? I wouldn't
    mind writing a post or elaborating on most of the subjects you write
    about here. Again, awesome web site!

    my web blog quick weight loss pills

    ReplyDelete
  13. The secondary stage involves the part of the process for treating the
    sewage water that gets rid of any solid waste that may
    be smaller than what the first phase can handle. Just like any other home component, a septic system
    requires regular maintenance to prevent ground water contamination and keep it
    functioning effectively. In general, more people living under the same roof will
    require frequent septic tank pumping service to maintain it
    clean.

    Feel free to visit my web blog wirelessreview.co.kr ()

    ReplyDelete
  14. Thank you for the auspicious writeup. It in fact was
    a amusement account it. Look advanced to more added agreeable from you!

    However, how can we communicate?

    My webpage - google

    ReplyDelete