In LocalDateTime class, there are three types of now() method depending upon the parameters passed to it.
now()
now() method of a LocalDateTime class used to obtain the current date-time from the system clock in the default time-zone.This method will return LocalDateTime based on system clock with default time-zone to obtain the current date-time.
Syntax:
public static LocalDateTime now()
Parameters: This method accepts no parameter.
Return value: This method returns the current date-time using the system clock.
Below programs illustrate the now() method:
Program 1:
// Java program to demonstrate// LocalDateTime.now() method  import java.time.*;  public class GFG {    public static void main(String[] args)    {          // create an LocalDateTime object        LocalDateTime lt            = LocalDateTime.now();          // print result        System.out.println("LocalDateTime : "                           + lt);    }} |
LocalDateTime : 2019-01-21T05:47:08.644
now(Clock clock)
now(Clock clock) method of a LocalDateTime class used to return the current date-time based on the specified clock passed as parameter
Syntax:
public static LocalDateTime now(Clock clock)
Parameters: This method accepts clock as parameter which is the clock to use.
Return value: This method returns the current date-time.
Below programs illustrate the now() method:
Program 1:
// Java program to demonstrate// LocalDateTime.now() method  import java.time.*;  public class GFG {    public static void main(String[] args)    {          // create a clock        Clock cl = Clock.systemUTC();          // create an LocalDateTime object using now(Clock)        LocalDateTime lt            = LocalDateTime.now(cl);          // print result        System.out.println("LocalDateTime : "                           + lt);    }} |
LocalDateTime : 2019-01-21T05:47:20.949
now(ZoneId zone)
now(ZoneId zone) method of a LocalDateTime class used to return the current date-time from system clock in the specified time-zone passed as parameter.Specifying the time-zone avoids dependence on the default time-zone.
Syntax:
public static LocalDateTime now(ZoneId zone)
Parameters: This method accepts zone as parameter which is the zone to use.
Return value: This method returns the current date-time.
Below programs illustrate the now() method:
Program 1:
// Java program to demonstrate// LocalDateTime.now() method  import java.time.*;  public class GFG {    public static void main(String[] args)    {          // create a clock        ZoneId zid = ZoneId.of("Europe/Paris");          // create an LocalDateTime object using now(zoneId)        LocalDateTime lt            = LocalDateTime.now(zid);          // print result        System.out.println("LocalDateTime : "                           + lt);    }} |
LocalDateTime : 2019-01-21T06:47:22.756
References:
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#now()
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#now(java.time.Clock)
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#now(java.time.ZoneId)
