# 
## Overview

The **`TimeUnit`** is an #key# enum: short for enumeration #key# that deals with different units of time and operations related to it. 

For example, it has different units of time:

- `NANOSECONDS`
- `MICROSECONDS`
- `MILLISECONDS`
- `SECONDS`
- `MINUTES`
- `HOURS`
- `DAYS`

The **`sleep()` method** of the `TimeUnit` performs a `Thread.sleep ` on the current thread using the time unit specified in the object. 

This is a handy function for converting time parameters into the format required by `Thread.sleep`.

---
> To learn more about `Thread.sleep` refer to [What is Thread.sleep() in Java?](https://www.educative.io/answers/what-is-threadsleep-in-java)

# 
## How to import the `TimeUnit` enum

The `TimeUnit` enum is defined in the `java.util.concurrent` package. Use the import statement below to import the `TimeUnit` enum:

---
```
import java.util.concurrent.TimeUnit;
```

#   
#  Syntax

---
```
public void sleep(long timeout)
```
---

# 
## Parameters

* **`long timeout`**: the minimum time to sleep.

---
> The timeout parameter value relies on the unit of time chosen for the time unit object.
---

##
## Return value  

The method does not return anything.

# 
## Code

In the code below, we create a time unit object with `SECONDS` as the unit of time.

The current thread is put to sleep for the number of seconds depending on the value passed to the method `sleep()` of the time unit object.

import java.util.concurrent.TimeUnit;

class Main {
    public static void main(String[] args) throws InterruptedException {
        TimeUnit timeUnit = TimeUnit.SECONDS;
        long sleepTimeInSeconds = 5;
        
        timeUnit.sleep(sleepTimeInSeconds);
        System.out.println("Slept for 5 seconds");
    }
}

What is TimeUnit.sleep() in Java?

The TimeUnit.sleep() method pauses the current thread according to the specified time unit in Java’s java.util.concurrent package.

What is TimeUnit.sleep() in Java?

Overview

How to import the TimeUnit enum

Syntax

Parameters

Return value

Code

How to import the `TimeUnit` enum