Q: What’s the difference between java 8 ZonedDateTime and OffsetDateTime? The javadocs say this: “OffsetDateTime, ZonedDateTime and Instant all store an instant on the time-line to nanosecond precision. Instant is the simplest, simply representing the instant. OffsetDateTime adds to the instant the offset from UTC/Greenwich, which allows the local date-time to be obtained. ZonedDateTime adds … Read more
When we are working with Java 8 Time package and Jackson good idea is to use jackson-modules-java8 project which serves many serialisers and deserialisers ready to use. To enable it we need to register JavaTimeModule module. To serialise Instant InstantSerializer is used. When we check how it is implemented we will find out that behind … Read more
You are calling the following method. public static OffsetDateTime parse(CharSequence text) { return parse(text, DateTimeFormatter.ISO_OFFSET_DATE_TIME); } It uses uses DateTimeFormatter.ISO_OFFSET_DATE_TIME as DateTimeFormatter which, as stated in the javadoc, does the following: The ISO date-time formatter that formats or parses a date-time with an offset, such as ‘2011-12-03T10:15:30+01:00’. If you want to parse a date with … Read more
First, if there’s any way you can avoid it, don’t rely on three letter time zone abbreviations. They are ambiguous, probably more often than not. When you say that IST should be mapped to Asia, it still leaves the choice between Asia/Tel_Aviv and Asia/Kolkata open (plus the aliases for those two, Asia/Jerusalem and Asia/Calcutta). In … Read more
long timeMicros = 1_565_245_051_795_306L; Instant i = Instant.EPOCH.plus(timeMicros, ChronoUnit.MICROS); System.out.println(i); Output is: 2019-08-08T06:17:31.795306Z Edit: Rather than dividing and multiplying to convert microseconds to milliseconds and/or seconds I preferred to use the built-in support for microseconds. Also when explicitly adding them to the epoch feels a little hand-held. You already know how to convert Instant to … Read more
There is no built-in method for what you want. However, you could apply following workaround: Locale locale = Locale.ENGLISH; String shortPattern = DateTimeFormatterBuilder.getLocalizedDateTimePattern( FormatStyle.SHORT, null, IsoChronology.INSTANCE, locale ); System.out.println(shortPattern); // M/d/yy if (shortPattern.contains(“yy”) && !shortPattern.contains(“yyy”)) { shortPattern = shortPattern.replace(“yy”, “yyyy”); } System.out.println(shortPattern); // M/d/yyyy DateTimeFormatter shortStyleFormatter = DateTimeFormatter.ofPattern(shortPattern, locale); LocalDate today = LocalDate.now(ZoneId.of(“America/Chicago”)); String output … Read more
LocalTime.parse Since you only have a time use the LocalTime class. No need to define a formatting pattern in your case. String str = “12:22:10”; LocalTime time = LocalTime.parse(str); See that code run live at IdeOne.com. See Oracle Tutorial for more info.
In Java SE 8, it is the responsibility of the application to create a class linking Period and Duration if that is needed. Note that a Duration contains an amount of seconds, not separate amounts of seconds, minutes and hours. The amount of seconds can exceed 24 hours, thus a Duration can represent a “day”. … Read more
Either use Hibernate 5.2.0+ or for earlier Hibernate 5 add the following dependency: <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-java8</artifactId> <version>${hibernate.version}</version> </dependency>
java.time package was added only in API 26 (Android O): https://developer.android.com/reference/java/time/package-summary.html UPDATE Starting with version 4.0 of the Android Gradle Plugin, you can use a subset of java.time APIs (along with a number of other Java 8 language APIs) without requiring a minimum API level for your app: https://developer.android.com/studio/write/java8-support#library-desugaring The following set of APIs are … Read more