Работа с enum в JAVA

public enum Currency {
        RU("ru", "Рубли", "ru-RU", +300),
        US("us", "Dollar", "en-US", -700);

        private final String code;
        private final String name;
        private final String countryCode;
        private final Integer locale;

        Currency(String code, String name, String countryCode, Integer locale) {
            this.code = code;
            this.name = name;
            this.countryCode = countryCode;
            this.locale = locale;
        }

        public String getCode() {
            return code;
        }
        public String getName() {
            return name;
        }
        public String getCountryCode() {
            return countryCode;
        }

        public Integer getLocale() {
            return locale;
        }
}