ZonedDateTime getLong() method in Java with Examples

Last Updated : 10 May, 2019

The getLong() method of ZonedDateTime class in Java is used to get the value of the specified field passed as input from this ZonedDateTime as an long value.This method queries this ZonedDateTime 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 method is unable to return int value then an exception is thrown. Syntax:

  public 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

// Java program to demonstrate // ZonedDateTime.getLong() method  import java.time.*; import java.time.temporal.ChronoField;  public class GFG {     public static void main(String[] args)     {          // create a ZonedDateTime object         ZonedDateTime 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

// Java program to demonstrate // ZonedDateTime.getLong() method  import java.time.*; import java.time.temporal.ChronoField;  public class GFG {     public static void main(String[] args)     {          // create a ZonedDateTime object         ZonedDateTime 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);         }     } }