ChronoZonedDateTime getLong() method in Java with Examples - Coding

The getLong() method of ChronoZonedDateTime interface in Java is used to get the value of the specified field passed as input from this ChronoZonedDateTime as an long value.This method queries this ChronoZonedDateTime for the value of the field and the returned value will always be within the valid range of values for the field. When the field is not supported and the method is unable to return int value then an exception is thrown.

Syntax:

default int getLong(TemporalField field)

Parameters: This method accepts a single parameter field which represents the field to get. This is a mandatory parameter and it should not be null.

Return value: This method returns an int value for the field.

Exception: This method throws following exceptions:

DateTimeException: if a value for the field cannot be obtained or the value is outside the range of valid values for the field.
UnsupportedTemporalTypeException : if the field is not supported or the range of values exceeds an int.
ArithmeticException : if numeric overflow occurs.

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

// Java program to demonstrate 
// ChronoZonedDateTime.getLong() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.ChronoField; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ChronoZonedDateTime object 
        ChronoZonedDateTime zonedDT 
            = ZonedDateTime.parse( 
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]"); 
  
        // get all enum of chronofield 
        // and iterate through all enum values 
        for (ChronoField field : ChronoField.values()) { 
  
            try { 
                // get long value of field 
                long value = zonedDT.getLong(field); 
                System.out.println("field : " + field 
                                   + " || value : " + value); 
            } 
            catch (Exception e) { 
                System.out.println("e " + field); 
            } 
        } 
    } 
} 

Output:

field : NanoOfSecond || value : 123000000
field : NanoOfDay || value : 69672123000000
field : MicroOfSecond || value : 123000
field : MicroOfDay || value : 69672123000
field : MilliOfSecond || value : 123
field : MilliOfDay || value : 69672123
field : SecondOfMinute || value : 12
field : SecondOfDay || value : 69672
field : MinuteOfHour || value : 21
field : MinuteOfDay || value : 1161
field : HourOfAmPm || value : 7
field : ClockHourOfAmPm || value : 7
field : HourOfDay || value : 19
field : ClockHourOfDay || value : 19
field : AmPmOfDay || value : 1
field : DayOfWeek || value : 4
field : AlignedDayOfWeekInMonth || value : 6
field : AlignedDayOfWeekInYear || value : 4
field : DayOfMonth || value : 6
field : DayOfYear || value : 340
field : EpochDay || value : 17871
field : AlignedWeekOfMonth || value : 1
field : AlignedWeekOfYear || value : 49
field : MonthOfYear || value : 12
field : ProlepticMonth || value : 24227
field : YearOfEra || value : 2018
field : Year || value : 2018
field : Era || value : 1
field : InstantSeconds || value : 1544104272
field : OffsetSeconds || value : 19800

Program 2:

// Java program to demonstrate 
// ChronoZonedDateTime.getLong() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.ChronoField; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ChronoZonedDateTime object 
        ChronoZonedDateTime zonedDT 
            = ZonedDateTime.parse( 
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]"); 
  
        // try to find AMPM_OF_DAY 
        // using ChronoField.AMPM_OF_DAY 
        // in getLong method 
        try { 
  
            long value 
                = zonedDT.getLong( 
                    ChronoField.AMPM_OF_DAY); 
  
            // print result 
            System.out.println("AMPM_OF_DAY value: "
                               + value); 
        } 
        catch (Exception e) { 
  
            // print exception 
            System.out.println("Exception: " + e); 
        } 
    } 
} 

Output:

AMPM_OF_DAY value: 1

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoZonedDateTime.html#getLong-java.time.temporal.TemporalField-

Reffered: https://www.geeksforgeeks.org

Java

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