public static boolean checkEmail(String email) {
    String str = "^\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$";
    Pattern p = Pattern.compile(str);
    Matcher m = p.matcher(email);
    return m.matches();
}

public static boolean checkNumber(String number) {
    String str = "^[0-9]*[0-9][0-9]*$";
    Pattern p = Pattern.compile(str);
    Matcher m = p.matcher(number);
    return m.matches();
}


public static boolean checkMobileNO(String value) {
    Pattern p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(14[0-9])|(17[0-9])|(18[0-9]))\\d{8}$");
    Matcher m = p.matcher(value);
    return m.matches();
}