In this article, we will learn how to form LocalDateTime passing Instant & ZoneId using LocalDateTime.ofInstant() method provided in Java 1.8 version
Form LocalDateTime passing Instant & ZoneId :
- LocalDateTime.ofInstant(Instant, ZoneId) –
- Obtains an instance of LocalDateTime from an Instant and Zone ID
- Instant – get current moment/instant using Instant.now() method
- ZoneId – get system default zone using ZoneId.systemDefault() method
- Pass Instant & ZoneId obtained in above steps to the LocalDateTime.ofInstant() method which returns LocalDateTime
- Finally, print LocalDateTime in different formatted style like SHORT & MEDIUM to the console
FormLocalDateTime3.java
package in.bench.resources.java8.localdatetime.examples;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
public class FormLocalDateTime3 {
public static void main(String[] args) {
// 1. get current moment or Instant
Instant instant = Instant.now();
System.out.println("Instant :- " + instant);
// 2. get default zone
ZoneId zoneId = ZoneId.systemDefault();
System.out.println("ZoneId :- " + zoneId);
// 3. form LocalDateTime passing current Instant & default ZoneId
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zoneId);
System.out.println("\nLocalDateTime :- " + localDateTime);
// 3.1 format LocalDateTime in FormatStyle.SHORT
String formattedStr1 = localDateTime.format(
DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT));
System.out.println("\nLocalDateTime in FormatStyle.SHORT :- " + formattedStr1);
// 3.2 format LocalDateTime in FormatStyle.MEDIUM
String formattedStr2 = localDateTime.format(
DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM));
System.out.print("LocalDateTime in FormatStyle.MEDIUM :- " + formattedStr2);
}
}
Output:
Instant :- 2022-08-08T12:09:35.937192900Z
ZoneId :- Asia/Calcutta
LocalDateTime :- 2022-08-08T17:39:35.937192900
LocalDateTime in FormatStyle.SHORT :- 08/08/22, 5:39 pm
LocalDateTime in FormatStyle.MEDIUM :- 08-Aug-2022, 5:39:35 pm
Related Articles:
- Java 8 – LocalDateTime with method details and examples
- Java 8 – How to get Date and Time fields from LocalDateTime ?
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- Java 8 – What are all the Temporal Fields supported by LocalDateTime ?
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- More Java 8 Date/Time API examples
References:
- https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html
- https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html
- https://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html
- https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html
- https://docs.oracle.com/javase/8/docs/api/java/time/format/FormatStyle.html
- https://docs.oracle.com/javase/7/docs/api/java/util/Date.html
- https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html
Happy Coding !!
Happy Learning !!