In Instant class, there are two types of isSupported() method depending upon the parameters passed to it.
isSupported(TemporalField field)
isSupported() method of a Instant class used to Check if the specified field is supported by Instant class or not means using this method we can check if this instant can be queried for the specified field.
The supported fields of ChronoField are:Â
- NANO_OF_SECOND
- MICRO_OF_SECOND
- MILLI_OF_SECOND
- INSTANT_SECONDS
All other ChronoField instances will return false.
Syntax:Â Â
public boolean isSupported(TemporalField field)
Parameters: This method accepts one single parameter field which is the field to check.
Return value: This method returns boolean value. It returns true if the field is supported on this instant, false if not.
Below programs illustrate the isSupported() method:
Program 1:Â Â
Java
// Java program to demonstrate// Instant.isSupported() methodÂ
import java.time.*;import java.time.temporal.ChronoField;Â
public class GFG {Â Â Â Â public static void main(String[] args)Â Â Â Â {Â
        // create a Instant object        Instant instant            = Instant.parse("2018-12-30T19:34:50.63Z");Â
        // check Milli of Second value from instant        boolean value            = instant.isSupported(                ChronoField.MILLI_OF_SECOND);Â
        // print result        System.out.println("MilliSecond Field is supported: "                           + value);    }} |
MilliSecond Field is supported: true
isSupported(TemporalUnit unit)
isSupported() method of a Instant class used to Check if the specified unit is supported by Instant class or not means using this method we can check if this instant can be queried for the specified unit.
The supported fields of ChronoUnit are:Â
- NANOS
- MICROS
- MILLIS
- SECONDS
- MINUTES
- HOURS
- HALF_DAYS
- DAYS
All other ChronoUnit instances will return false.
Syntax:Â Â
public boolean isSupported(TemporalUnit unit)
Parameters: This method accepts one single parameter unit which is the unit to check.
Return value: This method returns boolean value true if the field is supported on this instant, false if not.
Below programs illustrate the isSupported() method:
Program 1:Â Â
Java
// Java program to demonstrate// Instant.isSupported() methodÂ
import java.time.*;import java.time.temporal.ChronoUnit;Â
public class GFG {Â Â Â Â public static void main(String[] args)Â Â Â Â {Â
        // create a Instant object        Instant instant            = Instant.parse("2018-12-30T19:34:50.63Z");Â
        // check MILLIS ChronoUnit supported in instant        boolean value            = instant.isSupported(ChronoUnit.MILLIS);Â
        // print result        System.out.println("ChronoUnit MILLIS is supported: "                           + value);    }} |
ChronoUnit MILLIS is supported: true
Â
Reference: https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#isSupported(java.time.temporal.TemporalField), https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#isSupported(java.time.temporal.TemporalUnit)
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