validation email

public static boolean validate(String email) {
        email = email.trim();
        Pattern pattern = compile("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$");
        Matcher mat = pattern.matcher(email);
        return mat.matches();
    }