Java Code Examples for java.time.LocalDateTime#with()

@Test
@DisplayName("do nothing if the date is within range (middle)")
void doNothingIfDateWithinRangeMiddle() {
    LocalDateTime localDateTime = LocalDateTime.of(2015, Month.JUNE, 17, 13, 0);
    LocalDateTime adjusted = localDateTime.with(WorkingDaysAdjusters.defaultWorkingDays());
    assertNotNull(adjusted);
    assertEquals(DayOfWeek.WEDNESDAY, adjusted.getDayOfWeek());
    assertEquals(17, adjusted.getDayOfMonth());
    assertEquals(13, adjusted.getHour());
    assertEquals(0, adjusted.getMinute());
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Override
public Iterator<Instant> iterator() {
  LocalDateTime at = LocalDateTime.ofInstant(this.at, zoneId);
  LocalDateTime adjustedAt = at.with(adjuster);
  final LocalDateTime start = adjustedAt.isBefore(at)
      ? at.plus(amount).with(adjuster)
      : adjustedAt;

  return new Iterator<Instant>() {
    private LocalDateTime next = start;

    @Override
    public boolean hasNext() {
      return true;
    }

    @Override
    public Instant next() {
      Instant result = next.atZone(zoneId).toInstant();
      next = next.plus(amount).with(adjuster);

      return result;
    }

    @Override
    public void remove() {
      throw new UnsupportedOperationException("Schedule iterator does not support remove operation.");
    }
  };
}
 

@Test
@DisplayName("do nothing if the date is within range (end)")
void doNothingIfDateWithinRangeEnd() {
    LocalDateTime localDateTime = LocalDateTime.of(2015, Month.JUNE, 17, 19, 59);
    LocalDateTime adjusted = localDateTime.with(WorkingDaysAdjusters.defaultWorkingDays());
    assertNotNull(adjusted);
    assertEquals(DayOfWeek.WEDNESDAY, adjusted.getDayOfWeek());
    assertEquals(17, adjusted.getDayOfMonth());
    assertEquals(19, adjusted.getHour());
    assertEquals(59, adjusted.getMinute());
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test(dataProvider="printText")
public void test_appendText2arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    DateTimeFormatter f = builder.appendText(field, style).toFormatter(Locale.ENGLISH);
    LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
    dt = dt.with(field, value);
    String text = f.format(dt);
    assertEquals(text, expected);
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test
@UseDataProvider("data_text")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test(dataProvider="printText")
public void test_appendText2arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    DateTimeFormatter f = builder.appendText(field, style).toFormatter(Locale.ENGLISH);
    LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
    dt = dt.with(field, value);
    String text = f.format(dt);
    assertEquals(text, expected);
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

/**
 * Parse the RFC3164 date format. This is trickier than it sounds because this
 * format does not specify a year so we get weird edge cases at year
 * boundaries. This implementation tries to "do what I mean".
 * @param ts RFC3164-compatible timestamp to be parsed
 * @return Typical (for Java) milliseconds since the UNIX epoch
 */
public static long parseRfc3164Time(String ts) throws OnRecordErrorException {
  LocalDateTime now = LocalDateTime.now();
  int year = now.getYear();
  ts = TWO_SPACES.matcher(ts).replaceFirst(" ");
  LocalDateTime date;
  try {
    MonthDay monthDay = MonthDay.parse(ts, rfc3164Format);
    LocalTime time = LocalTime.parse(ts, rfc3164Format);
    // this is overly complicated because of the way Java 8 Time API works, as compared to Joda
    // essentially, we just want to pull year out of "now" and set all other fields based on
    // what was parsed
    date = now;
    // zero out millis since we aren't actually parsing those
    date = date.with(ChronoField.MILLI_OF_SECOND, 0);
    // set month and day of month from parsed
    date = date.withMonth(monthDay.getMonthValue()).withDayOfMonth(monthDay.getDayOfMonth());
    // set time fields from parsed
    date = date.withHour(time.getHour()).withMinute(time.getMinute()).withSecond(time.getSecond());
  } catch (DateTimeParseException e) {
    throw new OnRecordErrorException(Errors.SYSLOG_10, ts, e);
  }
  // The RFC3164 is a bit weird date format - it contains day and month, but no year. So we have to somehow guess
  // the year. The current logic is to provide a sliding window - going 11 months to the past and 1 month to the
  // future. If the message is outside of this window, it will have incorrectly guessed year. We go 11 months to the
  // past as we're expecting that more messages will be from the past (syslog usually contains historical data).
  LocalDateTime fixed = date;
  if (fixed.isAfter(now) && fixed.minusMonths(1).isAfter(now)) {
    fixed = date.withYear(year - 1);
  } else if (fixed.isBefore(now) && fixed.plusMonths(11).isBefore(now)) {
    fixed = date.withYear(year + 1);
  }
  date = fixed;
  return date.toInstant(ZoneOffset.UTC).toEpochMilli();
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

@Test(dataProvider="printText")
public void test_appendText2arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    DateTimeFormatter f = builder.appendText(field, style).toFormatter(Locale.ENGLISH);
    LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
    dt = dt.with(field, value);
    String text = f.format(dt);
    assertEquals(text, expected);
}
 

@Test(dataProvider="printText")
public void test_appendText2arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    DateTimeFormatter f = builder.appendText(field, style).toFormatter(Locale.ENGLISH);
    LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
    dt = dt.with(field, value);
    String text = f.format(dt);
    assertEquals(text, expected);
}
 

@Test(dataProvider="printText")
public void test_appendText1arg_format(TemporalField field, TextStyle style, int value, String expected) throws Exception {
    if (style == TextStyle.FULL) {
        DateTimeFormatter f = builder.appendText(field).toFormatter(Locale.ENGLISH);
        LocalDateTime dt = LocalDateTime.of(2010, 1, 1, 0, 0);
        dt = dt.with(field, value);
        String text = f.format(dt);
        assertEquals(text, expected);
    }
}
 

public static void main(String[] args) {

        LocalDate localDate = LocalDate.of(2019, 2, 28);

        System.out.println("LocalDate start of the day:");
        LocalDateTime ldDayStart1 = localDate.atStartOfDay();
        ZonedDateTime ldDayStartZone1 = localDate.atStartOfDay(ZoneId.of("Australia/Perth"));
        System.out.println("Start of the day without time zone via atStartOfDay(): " + ldDayStart1);
        System.out.println("Start of the day with time zone, Australia/Perth via atStartOfDay(): " + ldDayStartZone1);

        LocalDateTime ldDayStart2 = LocalDateTime.of(localDate, LocalTime.MIN);
        ZonedDateTime ldDayStartZone2 = LocalDateTime
                .of(localDate, LocalTime.MIN).atZone(ZoneId.of("Australia/Perth"));
        System.out.println("\nStart of the day without time zone via of(): " + ldDayStart2);
        System.out.println("Start of the day with time zone, Australia/Perth via of(): " + ldDayStartZone2);

        System.out.println("\n\nLocalDate end of the day:");
        LocalDateTime ldDayEnd1 = localDate.atTime(LocalTime.MAX);
        ZonedDateTime ldDayEndZone1 = localDate.atTime(LocalTime.MAX)
                .atZone(ZoneId.of("Australia/Perth"));
        System.out.println("End of the day without time zone via atTime(): " + ldDayEnd1);
        System.out.println("End of the day with time zone, Australia/Perth via atTime(): " + ldDayEndZone1);

        LocalDateTime ldDayEnd2 = LocalTime.MAX.atDate(localDate);
        ZonedDateTime ldDayEndZone2 = LocalTime.MAX.atDate(localDate)
                .atZone(ZoneId.of("Australia/Perth"));
        System.out.println("\nEnd of the day without time zone via atDate(): " + ldDayEnd2);
        System.out.println("End of the day with time zone, Australia/Perth via atDate(): " + ldDayEndZone2);

        System.out.println("\n\nLocalDateTime start of the day:");
        LocalDateTime localDateTime = LocalDateTime.of(2019, 2, 28, 18, 0, 0);
        LocalDateTime ldtDayStart = localDateTime.with(ChronoField.NANO_OF_DAY, LocalTime.MIN.toNanoOfDay());
        //LocalDateTime ldtDayStart = localDateTime.with(ChronoField.HOUR_OF_DAY, 0);
        ZonedDateTime ldtDayStartZone = localDateTime
                .with(ChronoField.NANO_OF_DAY, LocalTime.MIN.toNanoOfDay())
                .atZone(ZoneId.of("Australia/Perth"));
        System.out.println("\nStart of the day without time zone via with(): " + ldtDayStart);
        System.out.println("Start of the day with time zone, Australia/Perth via with(): " + ldtDayStartZone);

        LocalDateTime ldtDayEnd = localDateTime.with(ChronoField.NANO_OF_DAY, LocalTime.MAX.toNanoOfDay());
        // LocalDateTime ldtDayEnd = localDateTime.with(ChronoField.NANO_OF_DAY, 86399999999999L);
        ZonedDateTime ldtDayEndZone = localDateTime
                .with(ChronoField.NANO_OF_DAY, LocalTime.MAX.toNanoOfDay())
                .atZone(ZoneId.of("Australia/Perth"));
        System.out.println("\nEnd of the day without time zone via with(): " + ldtDayEnd);
        System.out.println("End of the day with time zone, Australia/Perth via with(): " + ldtDayEndZone);

        System.out.println("\n\nUTC start and end of the day:");
        ZonedDateTime zdt = ZonedDateTime.now(ZoneOffset.UTC);
        ZonedDateTime dayStartZdt = zdt.toLocalDate().atStartOfDay(zdt.getZone());
        ZonedDateTime dayEndZdt = zdt.toLocalDate().atTime(LocalTime.MAX).atZone(zdt.getZone());

        System.out.println("UTC time: " + zdt);
        System.out.println("Start day with UTC: " + dayStartZdt);
        System.out.println("End day with UTC: " + dayEndZdt);
    }
 

LocalDateTime getEndOfDayFromLocalDateTimeDirectly(LocalDateTime localDateTime) {
    LocalDateTime endOfDate = localDateTime.with(ChronoField.NANO_OF_DAY, LocalTime.MAX.toNanoOfDay());
    return endOfDate;
}
 

@Test
public void test() {

	LocalDateTime currentDateTime = LocalDateTime.of(2014, Month.APRIL, 30,
			0, 0);

	LocalDateTime adjustedDate = currentDateTime
			.with(new NinetyDayWeekendAdjuster());

	assertEquals(LocalDateTime.of(2014, Month.SEPTEMBER, 3, 0, 0),
			adjustedDate);

}