package javavk;

import java.util.regex.Pattern;

public class PhoneChecker {

    public static void main(String[] args) {
        System.out.println(checkPhone("+7 (900)-900-9000"));
        System.out.println(checkPhone(" +7 (900)-900-9000"));
        System.out.println(checkPhone("+7 (900)-900-9000 "));
        System.out.println(checkPhone(""));
    }

    private static final Pattern checkPhoneRegex = Pattern.compile("^\\+\\d\\s\\(\\d{3}\\)-\\d{3}-\\d{4}$");

    public static boolean checkPhone(String phone) {
        return checkPhoneRegex.matcher(phone).find();
    }
}