# 
#    

**`TimeUnit`** is an enum that deals with different units of time and the operations related to it. For example, it has different units of time such as nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, etc.

The **`of()`** method of `TimeUnit` is used to convert a `ChronoUnit` period unit to the equivalent `TimeUnit` representation.

##
## What is `ChronoUnit` in Java?

A **`ChronoUnit`** is an enum that represents a standard set of date periods units. This set of units provide unit-based access to manipulate a date, time, or date-time. 

Some examples of `ChronoUnit` period units are nanos, micros, seconds, half days, weeks, decades.

# 
## 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;
```

#   
## Method signature

```
public static TimeUnit of(ChronoUnit chronoUnit)
```

## Parameters

* `ChronoUnit chronoUnit`: the ChronoUnit to convert.

## Return value  

The method returns the converted equivalent of the `TimeUnit`.

# 
## Code

In the code below, we create a `ChronoUnit` object. 

Next, we check whether the method `of()` returns an object that is not null and is the instance of the `TimeUnit` class. 

Then, we print the value returned by the method to the console.

import java.time.temporal.ChronoUnit;
import java.util.concurrent.TimeUnit;

class Main {
    public static void main(String[] args){
        ChronoUnit chronoUnit = ChronoUnit.DAYS;
        assert TimeUnit.of(chronoUnit) != null && TimeUnit.of(chronoUnit) instanceof TimeUnit;
        System.out.println("Convert from TimeUnit to ChronoUnit - " + TimeUnit.of(chronoUnit));
    }
}

What is TimeUnit.of in Java?

TimeUnit.of() converts a ChronoUnit period to its equivalent TimeUnit. ChronoUnit represents standard date period units.

What is TimeUnit.of in Java?

What is ChronoUnit in Java?

How to import the TimeUnit enum

Method signature

Parameters

Return value

Code

What is `ChronoUnit` in Java?

How to import the `TimeUnit` enum