Java Instant compareTo() method

The compareTo() method of Java Instant class is used to compare this instant to the specified instant.

Syntax

Parameters

otherInstant - The other instant to compare to, not null.

Returns

The comparator value, negative if less, positive if greater.

Exceptions

NullPointerException - if otherInstant is null.

Example 1

import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.util.Set;

public class InstantcompareToExample1 {
   public static void main(String[] args) {

      Instant instant = Instant.parse("2017-02-03T10:37:30.00Z");
      System.out.println("Instant 1: " + instant);  

      Instant instant1 = Instant.parse("2017-03-03T10:37:30.00Z");
      System.out.println("Instant 2: " + instant1);  

      int result = instant.compareTo(instant1);
      System.out.println(result >1 ? "Instant 1 is greater than Instant 2."
         :"Instant 2 is greater than Instant 1.");  
   }
}

Output:

The output will be like this.

Instant 1: 2018-07-17T10:37:30Z
Instant 2: 2018-07-17T10:37:30Z
Instant 2 is greater than Instant 1.

Example 2

import java.time.Instant;
public class InstantcompareToExample2 {
  public static void main(String[] args) {
    Instant instant = Instant.parse("2018-07-17T10:15:30.00Z");
    System.out.println(instant.compareTo(Instant.now()));
 
  }
}

Output:

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