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Java Development

Forums Advisor I
Posts: 501
Registered: ‎03-01-2013
My Device: BlackBerry Z10

Email id validation


How to check that the email id that we are entering is valid or not??

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Posts: 354
Registered: ‎06-05-2013
My Device: Blackberry Z10
My Carrier: Vodafone

Re: Email id validation

public class ValidatingEmailAddressEditField
    extends EmailAddressEditField
  // ...

   * Validates an email address. Checks that there is an "@"
   * in the field and that the address ends with a host that
   * has a "." with at least two other characters after it and
   * no ".." in it. More complex logic might do better.
  public boolean isDataValid() {
    String address = getText();
    int at = address.indexOf("@");
    int len = address.length();
    if (at <= 0 || at > len - 6) return false;
    String host = address.substring(at + 1, len);
    len = host.length();
    if (host.indexOf("..") >= 0) return false;
    int dot = host.lastIndexOf(".");
    return (dot > 0 && dot <= len - 3);
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Posts: 19,601
Registered: ‎07-14-2008
My Device: Not Specified

Re: Email id validation

[ Edited ]

Perhaps a better way of doing this is using the built-in email checking available for the BasicEditField,  So the Email input FIeld will be coded something like:


BasicEditField befCheckingForEmail = new BasicEditField("Email: ", "", 255, BasicEditField.FILTER_EMAIL);


If you want to implement checking for Fields like this, then I recommend you look at using a regular expression.  There is no regular expression library available on BlackBerry, but this one seems to work:




Finally I recommend that you search the forum before asking questions.  Similar questions to this have been asked before, and you will find more robust email checking routines around, including this one:



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