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Java Instant Now() Method Example In Java [2021]

Java Instant Now() Method Example In Java [2021] 

Java Instant Now() method is overloaded method and has 2 variants
  • public static Instant now()
  • public static Instant now​(Clock clock)
Instant now() directly gives the Instant instance with the default system clock.
Instant now(Clock clock) gives us the liberty to change Clock and provide our own customized clock.

Java Instant Now

Java Instant Now

Now we are going to see Instant class now methods examples and other Instant class examples.

1. Java Instant now() Example 

This method Instant.now() gets the current instant instance from the system clock.
 import java.time.Instant;

 public class JavaInstantNow {
  public static void main(String[] args) {
    // java instant now example
    Instant instant = Instant.now();
    System.out.println("Instant now() : " + instant);
  }
 }

Output:

Instant now() : 2020-07-18T16:30:01.118Z

2. Java Instant now(Clock clock) Example

This method Instant.now(Clock clock) gets the current instant from the clock specified by user.
 import java.time.Clock;
 import java.time.Instant;

 public class JavaInstantNowClock {
   public static void main(String[] args) {
     // java instant now using clock
     Instant instant =
      Instant.now(Clock.systemDefaultZone());
     System.out.println("Java Instant now Clock : "
      + instant);
   }
 }

Output:

Java Instant now Clock : 2020-07-18T16:31:52.748Z

3. Java Instant now in UTC Timezone

This example shows us how we can get Instant instance in UTC Timezone.
 import java.time.Clock;
 import java.time.Instant;

 public class JavaInstantNowUTC {
   public static void main(String[] args) {
     // Java Instant Now UTC
     Instant instant = Instant.now(Clock.systemUTC());
     System.out.println("Java Instant now UTC : " + instant);
   }
 }

Output:

Java Instant now UTC : 2020-07-18T16:32:31.665Z

4. Java Instant now with custom Timezone

This example shows how we can get Instant instance in custom timezone specified by user. In this below example we get output in US/Eastern timezone.
 import java.time.Instant;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;

 public class JavaInstantNowTimezone {
   public static void main(String[] args) {
     Instant instant = Instant.now();
     System.out.println("Instant : " + instant);
		
     //Java Instant now with custome Timezone
     ZonedDateTime time =
     instant.atZone(ZoneId.of("US/Eastern"));
     System.out.println("Java Instant now Timezone : "
     + time);
   }
 }

Output:

Instant : 2020-07-18T16:33:31.672Z
Java Instant now Timezone : 2020-07-18T12:33:31.672-04:00[US/Eastern]

5. Java Instant now Example with custom Format 

In this example, we use custom format with Java Instant now instance to get instant in the format specified by the user. In the example below we are using yyyy-MM-dd HH:mm:ss format.
 import java.time.Instant;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;

 public class JavaInstantNowFormat {
   public static void main(String[] args) {
     Instant instant = Instant.now();

     // Java Instant now with format example
     DateTimeFormatter formatter =
     DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
    .withZone(ZoneId.systemDefault());

     System.out.println("Java Instant Now Format : "
     + formatter.format(instant));
   }
 }

Output:

Java Instant Now Format : 2020-07-18 22:03:59

6. Java Instant now Minus One Day Example

This example shows how we can get Minus one Day values from current Instant generated using Java Instant now method.
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;

 public class JavaInstantNowMinusOneDay {
   public static void main(String[] args) {
     Instant instant = Instant.now();
     System.out.println("Instant : " + instant);

     //Java Instant now Minus One Day
     Instant instantMinusOneDay =
      instant.minus(1, ChronoUnit.DAYS);

     System.out.println("Java Instant Now Minus One Day : "
      + instantMinusOneDay);
   }
 }

Output:

Instant : 2020-07-18T16:34:42.145Z
Java Instant Now Minus One Day : 2020-07-17T16:34:42.145Z

7. Java Instant now to NanoSeconds Example 

This example show how to convert Java Instant now instance to nanoseconds using method instant.getNano().
 import java.time.Instant;

 public class JavaInstantNowNanoSeconds {
   public static void main(String[] args) {
     Instant instant = Instant.now();
     System.out.println("Instant : " + instant);

     //Java Instant now Nanoseconds 
     int nanoseconds = instant.getNano();

     System.out.println("Java Instant now to Nanoseconds : "
     + nanoseconds);
   }
 }

Output:

Instant : 2020-07-18T16:35:47.386Z
Java Instant now to Nanoseconds : 386000000

8. Java Instant now to Date Example

This example shows how to convert Java Instant now instance to Date using Date.from(Instant instant) method.
 import java.time.Instant;
 import java.util.Date;

 public class JavaInstantNowToDate {
   public static void main(String[] args) {
    Instant instant = Instant.now();
    System.out.println("Instant : " + instant);

    // Java Instant now to Date
    Date date = Date.from(instant);
    System.out.println("Java Instant now to Date : " + date);
   }
 }

Output:

Instant : 2020-07-18T16:36:19.769Z
Java Instant now to Date : Sat Jul 18 22:06:19 IST 2020

Conclusion

In this tutorial, we have covered Java Instant Now method examples using Instant.now(), Instant.now(Clock clock) methods with other examples to Convert Instant to Date, Changing Java Instant now to custom formatted form and custom timezone, how to convert Java Instant now instance to Date.

Thanks for reading this tutorial so far. If you like this tutorial then please share it with your friends and colleagues. If you have any questions, doubts, suggestions, or feedback then please drop a comment and I'll try to answer your question.

Happy Learning!!!

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