Java Instant isSupported() method

The isSupported() method of Java Instant class is used to check if the specified field or unit is supported.

The isSupported() method consists of 2 parameters.

Syntax

public  boolean  isSupported(TemporalField field)
public  boolean  isSupported(TemporalUnit unit)

Parameters

field- The field to check, null returns false.

unit- The unit to check, null returns false.

Return

Exceptions

True, if the unit is supported on this instant, false if not.

Java Instant isSupported(TemporalField field) method

Example 1

import java.time.Instant;
import java.time.temporal.ChronoField;
public class InstantIsSupportedExample1 {
  public static void main(String[] args) {
    Instant instant = Instant.parse("2014-12-03T10:15:30.00Z");
    System.out.println(instant.isSupported(ChronoField.YEAR));
  }
}

Output:

The output will be like this.

false

Example 2

import java.time.Instant;
import java.time.temporal.ChronoField;
public class InstantIsSupportedExample2 {
   public static void main(String[] args) {
      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoField.NANO_OF_SECOND);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

true

Example 3

import java.time.Instant;
import java.time.temporal.ChronoField;
public class InstantIsSupportedExample3 {
   public static void main(String[] args) {
      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoField.HOUR_OF_DAY);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

false

Example 4

import java.time.Instant;
import java.time.temporal.ChronoField;
public class InstantIsSupportedExample4 {
   public static void main(String[] args) {
      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoField.MICRO_OF_SECOND);
      System.out.println(result);  
   }
}

Output:

The output will be like this:

true

Example 5

import java.time.Instant;
import java.time.temporal.ChronoField;
public class InstantIsSupportedExample5 {
    public static void main(String... args) {
        Instant i = Instant.now();
        System.out.println(i);
        for (ChronoField field : ChronoField.values()) {
            boolean v = i.isSupported(field);
            System.out.printf("%23s > %s%n", field, v);      

  }
 }
}

Output:

The output will be like this.

2017-05-01T20:57:45.145Z
           NanoOfSecond > true
              NanoOfDay > false
          MicroOfSecond > true
             MicroOfDay > false
          MilliOfSecond > true
             MilliOfDay > false
         SecondOfMinute > false
            SecondOfDay > false
           MinuteOfHour > false
            MinuteOfDay > false
             HourOfAmPm > false
        ClockHourOfAmPm > false
              HourOfDay > false
         ClockHourOfDay > false
              AmPmOfDay > false
              DayOfWeek > false
AlignedDayOfWeekInMonth > false
 AlignedDayOfWeekInYear > false
             DayOfMonth > false
              DayOfYear > false
               EpochDay > false
     AlignedWeekOfMonth > false
      AlignedWeekOfYear > false
            MonthOfYear > false
         ProlepticMonth > false
              YearOfEra > false
                   Year > false
                    Era > false
         InstantSeconds > true
          OffsetSeconds > false

Java Instant isSupported(TemporalUnit unit) method

Example 6

import java.time.Instant;
import java.time.temporal.ChronoUnit;
public class InstantIsSupportedExample6 {
   public static void main(String[] args) {
     Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoUnit.SECONDS);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

true

Example 7

import java.time.Instant;
import java.time.temporal.ChronoUnit;
public class InstantIsSupportedExample7 {
   public static void main(String[] args) {
      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoUnit.WEEKS);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

false

Example 8

import java.time.Instant;
import java.time.temporal.ChronoUnit;
public class InstantIsSupportedExample8 {
   public static void main(String[] args) {
      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoUnit.NANOS);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

true

Example 9

import java.time.Instant;
import java.time.temporal.ChronoUnit;
public class InstantIsSupportedExample9 {
   public static void main(String[] args) {

      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      boolean result = instant.isSupported(ChronoUnit.YEARS);
      System.out.println(result);  
   }
}

Output:

The output will be like this.

false

Example 10

import java.time.Instant;
import java.time.temporal.ChronoUnit;
public class InstantisSupportedExample10 {
    public static void main(String... args) {
        Instant i = Instant.now();
        System.out.println(i);
        for (ChronoUnit unit : ChronoUnit.values()) {
            boolean v = i.isSupported(unit);
            System.out.printf("%12s > %s%n", unit, v);
        }
    }
}

Output:

The output will be like this.

2017-05-01T20:57:47.276Z
       Nanos > true
      Micros > true
      Millis > true
     Seconds > true
     Minutes > true
       Hours > true
    HalfDays > true
        Days > true
       Weeks > false
      Months > false
       Years > false
     Decades > false
   Centuries > false
   Millennia > false
        Eras > false
     Forever > false

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