private static final DateTimeFormatter FORMAT_FOURTEEN = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");private static final DateTimeFormatter FORMAT_DATE = DateTimeFormatter.ofPattern("yyyyMMdd");private static final DateTimeFormatter FORMAT_NINETEEN = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");public static void main(String[] args) { System.out.println(FORMAT_FOURTEEN.format(LocalDateTime.now())); System.out.println(FORMAT_DATE.format(LocalDateTime.now())); System.out.println(FORMAT_NINETEEN.format(LocalDateTime.now()));}