java.time.Year.from java code examples

Common ways to obtain Year

private void myMethod () {
 Year y =Year.of(isoYear)
CharSequence text;Year.parse(text)
CharSequence text;DateTimeFormatter formatter;Year.parse(text, formatter)
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}

final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
return GregorianCalendar.from(y.atMonthDay(md).atStartOfDay(ZoneId.systemDefault()));

  @Override
  public Year queryFrom(TemporalAccessor temporal) {
    return Year.from(temporal);
  }
};

public static Year from(TemporalAccessor temporal) {
  return Year.from(temporal);
}

  @Override
  public Year convert(Object o, Context context) throws Exception {
    if (o == null) {
      return null;
    }

    if (o instanceof Date) {
      final ZonedDateTime dateTime = Instant.ofEpochMilli(((Date) o).getTime()).atZone(zone);
      return Year.of(dateTime.getYear());
    }

    if (o instanceof Integer || o instanceof Long) {
      return Year.of(((Number)o).intValue());
    }

    if (o instanceof TemporalAccessor) {
      return Year.from((TemporalAccessor) o);
    }

    throw new IllegalArgumentException("Cannot convert " + o + " to Year");
  }
}

  @Override
  public Year convert(Object o, Context context) throws Exception {
    if (o == null) {
      return null;
    }

    if (o instanceof Date) {
      final ZonedDateTime dateTime = Instant.ofEpochMilli(((Date) o).getTime()).atZone(zone);
      return Year.of(dateTime.getYear());
    }

    if (o instanceof Integer || o instanceof Long) {
      return Year.of(((Number)o).intValue());
    }

    if (o instanceof TemporalAccessor) {
      return Year.from((TemporalAccessor) o);
    }

    throw new IllegalArgumentException("Cannot convert " + o + " to Year");
  }
}

  private static String getFormatedDateString(String date, DateTimeFormatter formatter) {
    TemporalAccessor ta = formatter.parseBest(date,
      LocalDateTime::from, LocalDate::from, YearMonth::from, Year::from);
    if (ta instanceof LocalDateTime) {
      LocalDateTime ld = LocalDateTime.from(ta);
      return ld.format(DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss"));
    }
    if (ta instanceof LocalDate) {
      LocalDate ld = LocalDate.from(ta);
      return ld.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));
    }
    if (ta instanceof YearMonth) {
      YearMonth ld = YearMonth.from(ta);
      return ld.format(DateTimeFormatter.ofPattern("yyyy-MM"));
    }
    if (ta instanceof Year) {
      Year ld = Year.from(ta);
      return ld.format(DateTimeFormatter.ofPattern("yyyy"));
    }
    return date;
  }
}

  public FutureDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();
    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();
    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  public PastDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();
    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();
    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

private static void javaTimeTypes(Map<Class, ObjectMapperRsExtractor<?>> exs) {
  reg(exs, LocalDate.class, (rs, i) -> {
    Date date = rs.getDate(i);
    return date != null ? date.toLocalDate() : null;
  });
  reg(exs, LocalDateTime.class, (rs, i) -> {
    Timestamp stamp = rs.getTimestamp(i);
    return stamp != null ? stamp.toLocalDateTime() : null;
  });
  reg(exs, LocalTime.class, (rs, i) -> {
    Time time = rs.getTime(i);
    return time != null ? time.toLocalTime() : null;
  });
  reg(exs, Year.class, (rs, i) -> {
    Date date = rs.getDate(i);
    return date != null ? Year.from(date.toLocalDate()) : null;
  });
  reg(exs, YearMonth.class, (rs, i) -> {
    Date date = rs.getDate(i);
    return date != null ? YearMonth.from(date.toLocalDate()) : null;
  });
  reg(exs, Instant.class, (rs, i) -> {
    Timestamp stamp = rs.getTimestamp(i);
    return stamp != null ? stamp.toInstant() : null;
  });
}

  public PastOrPresentDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();

    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();

    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  private FutureOrPresentDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();
    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();
    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  public PastOrPresentDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();
    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();
    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  public PastDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();

    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();

    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  public FutureOrPresentDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();

    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();

    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  public FutureDummyEntity(ZonedDateTime dateTime) {
    calendar = GregorianCalendar.from( dateTime );
    date = calendar.getTime();

    instant = dateTime.toInstant();
    localDateTime = dateTime.toLocalDateTime();

    hijrahDate = HijrahDate.from( dateTime );
    japaneseDate = JapaneseDate.from( dateTime );
    localDate = LocalDate.from( dateTime );
    minguoDate = MinguoDate.from( dateTime );
    offsetDateTime = dateTime.toOffsetDateTime();
    thaiBuddhistDate = ThaiBuddhistDate.from( dateTime );
    year = Year.from( dateTime );
    yearMonth = YearMonth.from( dateTime );
    zonedDateTime = dateTime;
  }
}

  ldt =  YearMonth.from(ta).atDay(1);
} else if (ta.isSupported(ChronoField.YEAR)) {
  ldt = Year.from(ta).atDay(1);

Year end = Year.from(endExclusive);
if (unit instanceof ChronoUnit) {
  long yearsUntil = ((long) end.year) - year;  // no overflow

final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
return GregorianCalendar.from(y.atMonthDay(md).atStartOfDay(ZoneId.systemDefault()));

final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
final OffsetTime ot = OffsetTime.from(ta);
final Year y = Year.from(ta);
final MonthDay md = MonthDay.from(ta);
return GregorianCalendar.from(y.atMonthDay(md).atStartOfDay(ZoneId.systemDefault()));

@Test
public void testObjectToYear() throws Exception {
  ZoneId zoneId = ZoneId.systemDefault();
  Date now = new Date();
  Year year = Year.from(now.toInstant().atZone(zoneId));
  testObjectToYear(null, null);
  testObjectToYear(year, year);
  testObjectToYear(year.atMonth(6).atEndOfMonth().atTime(1, 0).atZone(zoneId), year);
  testObjectToYear(now, year);
  testObjectToYear(year.getValue(), year);
  try {
    testObjectToYear("a string", year);
    fail();
  } catch (IllegalArgumentException e) {
    // expected
  }
}

Javadoc

Obtains an instance of Year from a temporal object.

A TemporalAccessor represents some form of date and time information. This factory converts the arbitrary temporal object to an instance of Year.

The conversion extracts the ChronoField#YEAR field. The extraction is only permitted if the temporal object has an ISO chronology, or can be converted to a LocalDate.

This method matches the signature of the functional interface TemporalQueryallowing it to be used in queries via method reference, Year::from.

Popular methods of Year

of
Obtains an instance of Year. This method accepts a year value from the proleptic ISO calendar system
getValue
Gets the year value. The year returned by this method is proleptic as per get(YEAR).
parse
Obtains an instance of Year from a text string using a specific formatter. The text is parsed using
now
Obtains the current year from the system clock in the specified time-zone. This will query the Clock
toString
Outputs this year as a String.
atDay
Combines this year with a day-of-year to create a LocalDate. This returns a LocalDate formed from th
isLeap
Checks if the year is a leap year, according to the ISO proleptic calendar system rules. This method
atMonthDay
Combines this year with a month-day to create a LocalDate. This returns a LocalDate formed from this
format
Outputs this year as a String using the formatter. This year will be passed to the formatter DateTim
atMonth
Combines this year with a month to create a YearMonth. This returns a YearMonth formed from this yea
compareTo
Compares this year to another year. The comparison is based on the value of the year. It is "consist
plusYears
Returns a copy of this year with the specified number of years added. This instance is immutable and

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