private void commonLocalDate() {

LocalDate localDate = LocalDate.now();

System.out.println(localDate.toString());

System.out.println(localDate.getDayOfMonth());

System.out.println(localDate.getDayOfWeek().toString());

System.out.println(localDate.getDayOfYear());

System.out.println(localDate.isLeapYear());

System.out.println(localDate.plusDays(2).toString());

}

private void commonLocalTime() {

LocalTime localTimeNow = LocalTime.now();

System.out.println(localTimeNow);

System.out.println(localTimeNow.getSecond());

System.out.println(localTimeNow.getNano());

LocalTime localTime = LocalTime.of(10, 30);

System.out.println(localTime);

System.out.println(localTime.getHour());

System.out.println(localTime.minusMinutes(15));

System.out.println(localTime.isAfter(localTimeNow));

System.out.println(LocalTime.MIDNIGHT);

System.out.println(LocalTime.NOON);

}

private void commonLocalDateTime() {

LocalDateTime localDateTime = LocalDateTime.now();

System.out.println(localDateTime);

System.out.println(localDateTime.getDayOfWeek());

System.out.println(localDateTime.getMonthValue());

System.out.println(localDateTime.getNano());

System.out.println(localDateTime.plusWeeks(3));

}

private void commonInstantAndDuration() {

Instant instant = Instant.now();

System.out.println(instant);

System.out.println(Duration.ofMillis(5000));

System.out.println(instant.plusMillis(200));

System.out.println(instant.plus(Duration.ofMillis(200)));

System.out.println(Duration.between(instant, instant.minusMillis(300)));

// Period : handle bigger durations

System.out.println(Period.ofYears(3));

}

private void utilityOfEnums() {

//DayOfWeek

System.out.println(DayOfWeek.of(3));

System.out.println(LocalDate.now().with(DayOfWeek.THURSDAY));

System.out.println(Month.of(6));

System.out.println(MonthDay.now());

System.out.println(MonthDay.of(9, 23));

}

private void timeAdujstAndBuild() {

LocalDate localDate = LocalDate.of(2019, 3, 11);

System.out.println(localDate);

System.out.println(localDate.with(TemporalAdjusters.lastDayOfMonth()));

System.out.println(localDate.with(TemporalAdjusters.next(DayOfWeek.of(3))));

OffsetDateTime offsetDateTime = Year.of(2018)

.atMonth(3)

.atDay(2)

.atTime(10, 10)

.atOffset(ZoneOffset.UTC);

OffsetDateTime offsetDateTime1 = OffsetDateTime.of(2018, 3, 2, 0, 0, 0, 0, ZoneOffset.of("+09:00"));

System.out.println(offsetDateTime);

System.out.println(offsetDateTime1);

Clock clock = Clock.systemDefaultZone();

System.out.println(clock.getZone());

Clock clock_3 = Clock.system(ZoneOffset.of("+03:00"));

System.out.println(clock_3.getZone());

System.out.println(clock_3.instant());

Clock clock_eura = Clock.system(ZoneId.of("Europe/Tiraspol"));

System.out.println(clock_eura.getZone());

System.out.println(Clock.tick(clock_eura, Duration.ofSeconds(400)));

}

private void fromStringAndFormat(String input) {

String strDate = (input == null || input.isEmpty()) ? "2019-03-11" : input;

LocalDate localDate = LocalDate.parse(strDate);

System.out.println(localDate);

String armisticeDateTime = "2016-04-04T11:50";

LocalDateTime aLDT = LocalDateTime.parse(armisticeDateTime);

System.out.println("Date/Time: " + aLDT);

String formater = "dd MM yyyy";

DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(formater);

DateTimeFormatter dateTimeFormatter2 = DateTimeFormatter.ofPattern("dd/MM/yyyy");

LocalDate localDate1 = LocalDate.parse("04 07 2018", dateTimeFormatter);

System.out.println(localDate1);

System.out.println(dateTimeFormatter2.format(localDate1));

}

public static boolean laterThanToday(String date) {

String formate = "yyyy-MM-dd";

LocalDate input = LocalDate.parse(date, DateTimeFormatter.ofPattern(formate));

return LocalDate.now().isBefore(input);

}

public static boolean withIn90Days(String date) {

String formate = "yyyy-MM-dd";

LocalDate input = LocalDate.parse(date, DateTimeFormatter.ofPattern(formate));

return input.isBefore(LocalDate.now().plusDays(90));

}

public static void timezone() {

System.out.println(Arrays.toString(TimeZone.getAvailableIDs()));

TimeZone.setDefault(TimeZone.getTimeZone(ZoneId.of("Asia/Shanghai")));

System.out.println("system timezone: " + ZoneId.systemDefault());

System.out.println(ZonedDateTime.now());

System.out.println(Instant.now());

}

public static void main(String[] args) {

LocalDateTimeUtils utils = new LocalDateTimeUtils();

timezone();

}