java.util.time
Instant- An Instant represents a point in time (similar to java.util.Date) with nanoseconds precision (unlike the old Date which has milliseconds precision)
Instant.toString()returns a ISO8601 formatted string -> 2013-06-25T16:22:52.966Z
LocalDate- LocalDate represents a date without a time zone
- 1-1-2000
LocalTime- LocalTime represents time without a time zone
- 04:44:59.12
LocalDateTime
LocalDate & LocalTime
LocalDate localDate = LocalDate.now();
localDate = LocalDate.ofYearDay(2005, 86); // The 86th day of 2005 (27-Mar-2005)
localDate = LocalDate.of(2013, Month.AUGUST, 10); //10th of Aug 2013
LocalTime localTime = LocalTime.of(22, 33); //10:33 PM
localTime = LocalTime.now();
localTime = LocalTime.ofSecondOfDay(4503); // The 4,503 second in a day (1:15:30 AM)
LocalDateTime
https://matsumana.info/blog/2014/06/17/jsr310-parse-from-string/
before
@Test
public void デフォルトでは存在しない日付をパースしても例外にならない() {
LocalDateTime expected = LocalDateTime.of(2014, 4, 30, 3, 4, 5, 123_000_000);
// 存在しない日付
LocalDateTime actual = LocalDateTime.parse("2014/04/31 03:04:05.123",
DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss.SSS"));
// 存在しない日の前日にパースされる
assertThat(actual, is(expected));
}
after : 存在しないdateなら 例外が発生する
@Test
public void 厳密モード() {
LocalDateTime expected = LocalDateTime.of(2014, 4, 30, 3, 4, 5, 123_000_000);
// 存在しない日付
// yyyyですると ISOエラーが発生
//LocalDateTime actual = LocalDateTime.parse("2014/04/31 03:04:05.123",
// DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss.SSS").withResolverStyle(ResolverStyle.STRICT));
LocalDateTime actual = LocalDateTime.parse("2014/04/31 03:04:05.123",
DateTimeFormatter.ofPattern("uuuu/MM/dd HH:mm:ss.SSS").withResolverStyle(ResolverStyle.STRICT));
assertThat(actual, is(expected));
}