Custom month name java8

custom month name java8

        def monthNameMap = [1L: "MIK", 2L: "PIK", 3L: "CIK"]

        LocalDate date = LocalDate.now()
        DateTimeFormatter formatter = new DateTimeFormatterBuilder()
                .appendPattern("yyyy ")
                .appendText(ChronoField.MONTH_OF_YEAR, monthNameMap)
                .toFormatter(Locale.FRENCH)

        for (int i = 0; i < 12; ++i) {
            date = date.minusMonths(1)
            println formatter.format(date)
        }