Transform Date Time to LocalDate as well as LocalDateTime

1. Intro

Date time, likewise referred to as Unix time, is a system for standing for days as well as times as a solitary numerical worth. It gauges the variety of nanoseconds expired considering that January 1, 1970, at 00:00:00 Collaborated Universal Time (UTC). Date time is extensively made use of in computer system systems as well as shows languages for its simpleness as well as convenience of control.

In this tutorial, we’ll check out the conversion of date time in nanoseconds to LocalDate as well as LocalDateTime

2. Transforming Date Time to LocalDate

To transform date time to LocalDate, we require to transform the date time in nanoseconds to an Immediate item.

An Immediate stands for a factor on the timeline in the UTC timezone:

 long epochTimeMillis = 1624962431000L;// Instance date time in nanoseconds
Immediate immediate = Instant.ofEpochMilli( epochTimeMillis);

Once we have the Immediate item, we can transform it to a LocalDate item by defining a timezone making use of the atZone() approach as well as removing the day component:

 ZoneId zoneId = ZoneId.systemDefault();// Utilize the system default time area
LocalDate localDate = instant.atZone( zoneId). toLocalDate();.

Lastly, we can result the transformed LocalDate item in human-readable layout:

 System.out.println( localDate);// Result: 2021-06-29

We can layout the day making use of a details pattern with the DateTimeFormatter course:

 DateTimeFormatter formatter = DateTimeFormatter.ofPattern(" yyyy-MM-dd");.
String formattedDate = localDate.format( formatter);.
System.out.println( formattedDate);// Result: 2021-06-29

We can pick various patterns based upon the demands.

Right here’s a depiction of the manuscript:

 long epochTimeMillis = 1624962431000L;// Instance date time in nanoseconds.
Immediate immediate = Instant.ofEpochMilli( epochTimeMillis);.

ZoneId zoneId = ZoneId.systemDefault();// Utilize the system default time area.
LocalDate localDate = instant.atZone( zoneId). toLocalDate();.

DateTimeFormatter formatter = DateTimeFormatter.ofPattern(" yyyy-MM-dd");.
String formattedDate = localDate.format( formatter);.
System.out.println( formattedDate);// Result: 2021-06-29

Utilizing these 4 actions, we can conveniently transform date time in nanoseconds to LocalDate as well as also define a layout for the result.

3. Transforming Date Time to LocalDateTime

The actions for transforming date time in nanoseconds to LocalDateTime resemble the instance over for LocalDate The only distinction is we’ll import the LocalDateTime course.

Placing all of it with each other, right here’s the manuscript to transform to LocalDateTime:

 long epochTimeMillis = 1624962431000L;// Instance date time in nanoseconds.
Immediate immediate = Instant.ofEpochMilli( epochTimeMillis);.

ZoneId zoneId = ZoneId.systemDefault();// Utilize the system default time area.
LocalDateTime localDateTime = instant.atZone( zoneId). toLocalDateTime();.

DateTimeFormatter formatter = DateTimeFormatter.ofPattern(" yyyy-MM-dd HH: mm: ss");.
String formattedDateTime = localDateTime.format( formatter);.
System.out.println( formattedDateTime);// Result: 2021-06-29 12:13:51.

The manuscript transforms date time in nanoseconds to LocalDateTime, as well as we can layout the day as well as time making use of the DateTimeFormatter course.

4. Final Thought

In this post, we have actually checked out the conversion of date time in nanoseconds to LocalDate as well as LocalDateTime It’s a rather uncomplicated procedure, as well as we have actually used the DateTimeFormatter course to transform the result to a details day or time layout.

The complete execution of this post is readily available over on GitHub