TimeUnit (Java Platform SE 8 )

java.lang.Object
- java.lang.Enum<TimeUnit>
- - java.util.concurrent.TimeUnit

All Implemented Interfaces:

Serializable, Comparable<TimeUnit>
```
public enum TimeUnit
extends Enum<TimeUnit>
```
A TimeUnit represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units. A TimeUnit does not maintain time information, but only helps organize and use time representations that may be maintained separately across various contexts. A nanosecond is defined as one thousandth of a microsecond, a microsecond as one thousandth of a millisecond, a millisecond as one thousandth of a second, a minute as sixty seconds, an hour as sixty minutes, and a day as twenty four hours.
A TimeUnit is mainly used to inform time-based methods how a given timing parameter should be interpreted. For example, the following code will timeout in 50 milliseconds if the lock is not available:
```
 
 Lock lock = ...;
 if (lock.tryLock(50L, TimeUnit.MILLISECONDS)) ...
```
while this code will timeout in 50 seconds:
```
 
 Lock lock = ...;
 if (lock.tryLock(50L, TimeUnit.SECONDS)) ...
```
Note however, that there is no guarantee that a particular timeout implementation will be able to notice the passage of time at the same granularity as the given TimeUnit.
Since:

1.5

Enum Constant Summary

Enum Constants
Enum Constant and Description
`DAYS` Time unit representing twenty four hours
`HOURS` Time unit representing sixty minutes
`MICROSECONDS` Time unit representing one thousandth of a millisecond
`MILLISECONDS` Time unit representing one thousandth of a second
`MINUTES` Time unit representing sixty seconds
`NANOSECONDS` Time unit representing one thousandth of a microsecond
`SECONDS` Time unit representing one second

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`long`	`convert(long sourceDuration, TimeUnit sourceUnit)` Converts the given time duration in the given unit to this unit.
`void`	`sleep(long timeout)` Performs a `Thread.sleep` using this time unit.
`void`	`timedJoin(Thread thread, long timeout)` Performs a timed `Thread.join` using this time unit.
`void`	`timedWait(Object obj, long timeout)` Performs a timed `Object.wait` using this time unit.
`long`	`toDays(long duration)` Equivalent to `DAYS.convert(duration, this)`.
`long`	`toHours(long duration)` Equivalent to `HOURS.convert(duration, this)`.
`long`	`toMicros(long duration)` Equivalent to `MICROSECONDS.convert(duration, this)`.
`long`	`toMillis(long duration)` Equivalent to `MILLISECONDS.convert(duration, this)`.
`long`	`toMinutes(long duration)` Equivalent to `MINUTES.convert(duration, this)`.
`long`	`toNanos(long duration)` Equivalent to `NANOSECONDS.convert(duration, this)`.
`long`	`toSeconds(long duration)` Equivalent to `SECONDS.convert(duration, this)`.
`static TimeUnit`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static TimeUnit[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - NANOSECONDS
```
public static final TimeUnit NANOSECONDS
```
    Time unit representing one thousandth of a microsecond
  - MICROSECONDS
```
public static final TimeUnit MICROSECONDS
```
    Time unit representing one thousandth of a millisecond
  - MILLISECONDS
```
public static final TimeUnit MILLISECONDS
```
    Time unit representing one thousandth of a second
  - SECONDS
```
public static final TimeUnit SECONDS
```
    Time unit representing one second
  - MINUTES
```
public static final TimeUnit MINUTES
```
    Time unit representing sixty seconds
  - HOURS
```
public static final TimeUnit HOURS
```
    Time unit representing sixty minutes
  - DAYS
```
public static final TimeUnit DAYS
```
    Time unit representing twenty four hours
- Method Detail
  - values
```
public static TimeUnit[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (TimeUnit c : TimeUnit.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static TimeUnit valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - convert
```
public long convert(long sourceDuration,
                    TimeUnit sourceUnit)
```
    Converts the given time duration in the given unit to this unit. Conversions from finer to coarser granularities truncate, so lose precision. For example, converting 999 milliseconds to seconds results in 0. Conversions from coarser to finer granularities with arguments that would numerically overflow saturate to Long.MIN_VALUE if negative or Long.MAX_VALUE if positive.
    For example, to convert 10 minutes to milliseconds, use: TimeUnit.MILLISECONDS.convert(10L, TimeUnit.MINUTES)
    
    Parameters:
    
    sourceDuration - the time duration in the given sourceUnit
    
    sourceUnit - the unit of the sourceDuration argument
    
    Returns:
    
    the converted duration in this unit, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
  - toNanos
```
public long toNanos(long duration)
```
    Equivalent to NANOSECONDS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
  - toMicros
```
public long toMicros(long duration)
```
    Equivalent to MICROSECONDS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
  - toMillis
```
public long toMillis(long duration)
```
    Equivalent to MILLISECONDS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
  - toSeconds
```
public long toSeconds(long duration)
```
    Equivalent to SECONDS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
  - toMinutes
```
public long toMinutes(long duration)
```
    Equivalent to MINUTES.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
    
    Since:
    
    1.6
  - toHours
```
public long toHours(long duration)
```
    Equivalent to HOURS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration, or Long.MIN_VALUE if conversion would negatively overflow, or Long.MAX_VALUE if it would positively overflow.
    
    Since:
    
    1.6
  - toDays
```
public long toDays(long duration)
```
    Equivalent to DAYS.convert(duration, this).
    
    Parameters:
    
    duration - the duration
    
    Returns:
    
    the converted duration
    
    Since:
    
    1.6
  - timedWait
```
public void timedWait(Object obj,
                      long timeout)
               throws InterruptedException
```
    Performs a timed Object.wait using this time unit. This is a convenience method that converts timeout arguments into the form required by the Object.wait method.
    For example, you could implement a blocking poll method (see BlockingQueue.poll) using:
```
 
 public synchronized Object poll(long timeout, TimeUnit unit)
     throws InterruptedException {
   while (empty) {
     unit.timedWait(this, timeout);
     ...
   }
 }
```
    Parameters:
    
    obj - the object to wait on
    
    timeout - the maximum time to wait. If less than or equal to zero, do not wait at all.
    
    Throws:
    
    InterruptedException - if interrupted while waiting
  - timedJoin
```
public void timedJoin(Thread thread,
                      long timeout)
               throws InterruptedException
```
    Performs a timed Thread.join using this time unit. This is a convenience method that converts time arguments into the form required by the Thread.join method.
    
    Parameters:
    
    thread - the thread to wait for
    
    timeout - the maximum time to wait. If less than or equal to zero, do not wait at all.
    
    Throws:
    
    InterruptedException - if interrupted while waiting
  - sleep
```
public void sleep(long timeout)
           throws InterruptedException
```
    Performs a Thread.sleep using this time unit. This is a convenience method that converts time arguments into the form required by the Thread.sleep method.
    
    Parameters:
    
    timeout - the minimum time to sleep. If less than or equal to zero, do not sleep at all.
    
    Throws:
    
    InterruptedException - if interrupted while sleeping

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2017, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.

Enum TimeUnit

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

NANOSECONDS

MICROSECONDS

MILLISECONDS

SECONDS

MINUTES

HOURS

DAYS

Method Detail

values

valueOf

convert

toNanos

toMicros

toMillis

toSeconds

toMinutes

toHours

toDays

timedWait

timedJoin

sleep