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What is the difference between ZoneOffset.UTC and ZoneId.of(“UTC”)?

Why does ZonedDateTime now = ZonedDateTime.now(); System.out.println(now.withZoneSameInstant(ZoneOffset.UTC) .equals(now.withZoneSameInstant(ZoneId.of("UTC")))); print out false? I would expect the both ZonedDateTime instances to be equal. 1 Answer ...

June 4, 2022
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How can I create a Java 8 LocalDate from a long Epoch time in Milliseconds?

I have an external API that returns me dates as longs, represented as milliseconds since the beginning of the Epoch. With the old ...

May 17, 2022
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Differences between Java 8 Date Time API (java.time) and Joda-Time

I know there are questions relating to java.util.Date and Joda-Time. But after some digging, I couldn’t find a thread about the differences between ...

May 17, 2022
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serialize/deserialize java 8 java.time with Jackson JSON mapper

How do I use Jackson JSON mapper with Java 8 LocalDateTime? org.codehaus.jackson.map.JsonMappingException: Can not instantiate value of type...

May 17, 2022
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UnsupportedTemporalTypeException when formatting Instant to String

I’m trying to format an Instant to a String using the new Java 8 Date and Time API and the following pattern: Instant ...

May 15, 2022
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Calculate days between two Dates in Java 8

I know there are lots of questions on SO about how to get Dates in Java, but I want an example using new ...

May 12, 2022
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How to get milliseconds from LocalDateTime in Java 8

I am wondering if there is a way to get current milliseconds since 1-1-1970 (epoch) using the new LocalDate, LocalTime or LocalDateTime classes ...

May 9, 2022
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Convert java.time.LocalDate into java.util.Date type

I want to convert java.time.LocalDate into java.util.Date type. Because I want to set the date into JDateChooser. Or is there any date chooser ...

May 7, 2022
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How to parse/format dates with LocalDateTime? (Java 8)

Java 8 added a new java.time API for working with dates and times (JSR 310). I have date and time as string (e.g. ...

May 7, 2022
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Converting between java.time.LocalDateTime and java.util.Date

Java 8 has a completely new API for date and time. One of the most useful classes in this API is LocalDateTime, for ...

May 1, 2022
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