Gets a clock that obtains the current instant using the best available system clock.

A period of zero length

Returns a date based on the specified year, month and day-ofMonth values

Returns a date based on the specified year, month and day-of-month values

Gets a clock that always returns the same instant in the UTC time-zone.

Obtains the current instant from the system clock.

Creates new instance of Time.

Returns current date according to the provided system clock and time zone.

A clock providing access to the current instant, date and time using a time-zone.

Instances of this class are used to find the current instant, which can be interpreted using the stored time-zone to find the current date and time. As such, a clock can be used instead of {@link System#currentTimeMillis()} and {@link TimeZone#getDefault()}.

The primary purpose of this abstraction is to allow alternate clocks to be plugged in as and when required. Applications use an object to obtain the current time rather than a static method. This can simplify testing.

Applications should avoid using the static methods on this class. Instead, they should pass a {@code Clock} into any method that requires it. A dependency injection framework is one way to achieve this:

public class MyBean {
  private Clock clock;  // dependency inject
  ...
  public void process(LocalDate eventDate) {
    if (eventDate.isBefore(LocalDate.now(clock)) {
      ...
    }
  }
}

This approach allows an alternate clock, such as {@link #fixed} to be used during testing.

The {@code system} factory method provides clocks based on the best available system clock, such as {@code System.currentTimeMillis}.

An interface for date objects in the ISO-8601 calendar system.

A date is often viewed as triple of year-month-day values. This interface also defines access to other date fields such as day-of-year, day-of-week and week-of-year.

An abstract moment in time (like 4pm, October 21. 2012).

DateTime does not contain a time zone information, so You can not use it to record or schedule events.

Time of day like 6pm or 8.30am.

This type contains only information about an abstract time of day without referencing any date or timezone.

You use Time to specify something that has to occur on a specific time of day like “lunch hour starts at 1pm” or “shop opens at 10am”.

Duration specifies a discreet amount of milliseconds between two instances of time.

A specific instant of time on a continuous time-scale.

An instant represents a single point in time irrespective of any time-zone offsets or geographical locations

An immutable period consisting of the ISO-8601 years, months, days, hours, minutes, seconds and milliseconds, such as '3 Months, 4 Days and 7 Hours'.

A period is a human-scale description of an amount of time.

Gets a clock that obtains the current instant using the best available system clock.