Android JAVA String Validation

Question

i have a question :

I want to create an app that take a String from user input. This String will be in an email format. So there's some requirement's :

.(full stop) can't be placed before @
.(full stop) and @ can't be more than one
.(full stop) and @ can't be side by side

Note : This is NOT a school homework(i just felt that this is like a homework after i typed it), i just want to learn more about String :D

I already did some research's but i still can't solve those problem's :D

Thanks all, and sory if i made some mistake's, English is not my native languange :D

Why would you want to prevent 'dot' from appearing before @? it is valid. — Asaf
– Asaf, Commented Feb 28, 2012 at 13:17
Hm...yes i made a mistake, i think it's invalid :D But it's okay, coz i think the first is the hardest one :D — Blaze Tama
– Blaze Tama, Commented Feb 28, 2012 at 13:24

Samir Mangroliya · Accepted Answer · 2012-02-28 13:22:41Z

3

This is Universal Email Validation For Email

 if(eMailValidation(YourEmailString)){
          /// right  Email-id
      }
    public boolean eMailValidation(String emailstring) {
            Pattern emailPattern = Pattern.compile(".+@.+\\.[a-z]+");
            Matcher emailMatcher = emailPattern.matcher(emailstring);
            return emailMatcher.matches();
        }

edited Feb 28, 2012 at 13:22

answered Feb 28, 2012 at 13:16

Samir Mangroliya

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5 Comments

Blaze Tama Over a year ago

Thanks Sir :D If possible, i want to get the "manual" one..coz i want to know it's syntax and how to implement them :D And i will have to change some requirement's so it's not just like a normal email Thank you Sir :D

Samir Mangroliya Over a year ago

what you want actually ? i cant understand?

Blaze Tama Over a year ago

Sorry :D Hm..maybe like using some loop's and if's and then using some method's like isDigit or isSpace in C :D

Blaze Tama Over a year ago

Hm..yes..i mean i want to check it in that way.. Like : for (int i = 0; i < strlen(example); i++){ if(isDigit(example[i]))return 0; } It's something like that, i called it manually :D THanks Sir :D

Blaze Tama Over a year ago

well, i want to check those 3 requrement's...the isDigit is just for example :D Do you understand what i mean?he2 Sorry Sir, English is not my native languange :D

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