Solved

String manipulation

Posted on 2004-04-03
12
406 Views
Last Modified: 2013-11-24
What is a good way to test if a user entered value is in a valid email format? i.e. myName@myDomain.com
0
Comment
Question by:tricks801
  • 6
  • 2
  • 2
  • +2
12 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 10749783
Try

final String MAIL_RE = "^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$";

boolean validEmail = input.matches(MAIL_RE);
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 250 total points
ID: 10749799
Hang on - have to Java-fy that:

final String MAIL_RE = "^[A-Za-z0-9](([_\\.\\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\\.\\-]?[a-zA-Z0-9]+)*)\\.([A-Za-z]{2,})$";
0
 

Author Comment

by:tricks801
ID: 10749810
i received an illegal escape character at some . and -
0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 
LVL 86

Expert Comment

by:CEHJ
ID: 10749821
Did you miss my correction?
0
 
LVL 92

Assisted Solution

by:objects
objects earned 150 total points
ID: 10749823
this'll do a bit better, add any domains as appropriate.

  public static boolean isValidEmailAddress(String email)
  {
    String regex = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[_A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*\\.(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)";
    return email.matches(regex);
  }
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10749842
>>this'll do a bit better

Why so - in what way?
0
 
LVL 16

Assisted Solution

by:gnoon
gnoon earned 50 total points
ID: 10751457
If you already have javamail package

public boolean isValidEmailAddresses(String addresslist) {
    javax.mail.internet.InternetAddress addresses[];
    try {
        addresses = javax.mail.internet.InternetAddress.parse(addresslist, false);
    } catch(javax.mail.internet.AddressException e) { return false; }
    return (addresses != null && addresses.length > 0);
}

you can test the value for valid email address list string e.g. "user@dom.org" or "user1@dom1.org, user2@dom2.org".
0
 
LVL 13

Assisted Solution

by:Webstorm
Webstorm earned 50 total points
ID: 10751472
you need to put international domains too:

"^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[_A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*\\.(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|be|ch|co|de|es|fr|it|jp|kr|ru|se|sk|uk ..............

0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10751595
>>If you already have javamail package

AFAIK the package only makes relatively crude checks on address validity
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10752976
8-)
0
 
LVL 92

Expert Comment

by:objects
ID: 10753522
0
 
LVL 13

Expert Comment

by:Webstorm
ID: 10755802
:-)
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to increase Spring boot/Tomcat max file upload size 2 76
Java string replace 11 48
ejb on wildfly 5 20
eclipse console opening separately 2 21
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
This video teaches viewers about errors in exception handling.

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question