Question

Is there some standard email validator code sample for Java ME or BlackBerry?

Answer 1

public static boolean validateEmailID(String email) {
    email = email.trim();
    String reverse = new StringBuffer(email).reverse().toString();
    if (email == null || email.length() == 0 || email.indexOf("@") == -1) {
        return false;
    }
    int emailLength = email.length();
    int atPosition = email.indexOf("@");
    int atDot = reverse.indexOf(".");

    String beforeAt = email.substring(0, atPosition);
    String afterAt = email.substring(atPosition + 1, emailLength);

    if (beforeAt.length() == 0 || afterAt.length() == 0) {
        return false;
    }
    for (int i = 0; email.length() - 1 > i; i++) {
        char i1 = email.charAt(i);
        char i2 = email.charAt(i + 1);
        if (i1 == '.' && i2 == '.') {
            return false;
        }
    }
    if (email.charAt(atPosition - 1) == '.' || email.charAt(0) == '.' || email.charAt(atPosition + 1) == '.' || afterAt.indexOf("@") != -1 || atDot < 2) {
        return false;
    }

    return true;
}