ZonedDateTime form() method in Java with Examples

The from() method of ZonedDateTime class in Java is used to get instance of ZonedDateTime from TemporalAccessor object passed as parameter. A TemporalAccessor represents an arbitrary set of date and time information and this method helps to get an instant of ZonedDateTime based on the specified TemporalAccessor object.

Syntax:

public static ZonedDateTime 
                from(TemporalAccessor temporal)

Parameters: This method accepts a single parameter temporal which represents the temporal object to convert. This is a mandatory parameter and it should not be NULL.



Return value: This method returns a the zoned date-time.

Exception: This method throws a DateTimeException if unable to convert to an ZonedDateTime.

Below programs illustrate the from() method:
Program 1:

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// Java program to demonstrate
// ZonedDateTime.from() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a ZonedDateTime object
        ZonedDateTime zonedDT
            = ZonedDateTime.now();
  
        // create a ZonedDateTime object using
        // from() method
        ZonedDateTime result = ZonedDateTime.from(zonedDT);
  
        // print result
        System.out.println("ZonedDateTime: "
                           + result);
    }
}

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Output:

ZonedDateTime: 2018-12-12T19:03:06.445Z[Etc/UTC]

Program 2:

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// Java program to demonstrate
// ZonedDateTime.from() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a OffsetDateTime object
        OffsetDateTime offset
            = OffsetDateTime.now();
  
        // create a ZonedDateTime object using
        // from() method
        ZonedDateTime result = ZonedDateTime.from(offset);
  
        // print result
        System.out.println("ZonedDateTime: "
                           + result);
    }
}

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Output:

ZonedDateTime: 2018-12-12T19:03:09.523Z

Reference:
https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#from(java.time.temporal.TemporalAccessor)



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