The **`kotlin.collections` package** is part of Kotlin's standard library. 

It contains all collection types, such as:
* ```Map```
* ```List```
* ```Set```, etc.

The package provides the **```ArrayList``` class**, which is a mutable list and uses a dynamic resizable array as the backing storage.

#    
#  The `isEmpty()` method

The `ArrayList` class contains the **`isEmpty()` method**, which is used to check if the array list is empty or not. 

If the list does not have any elements, it returns `true`. Otherwise, it returns `false`.

##    
### Syntax
```
fun isEmpty(): Boolean
```

### Arguments 
- This method does not take any arguments.

### Return value
- It returns `true` if the list is empty, and `false` otherwise.

##  
## Things to note
- `ArrayList` follows the sequence of insertion of elements.

- It is allowed to contain duplicate elements.

The illustration below shows the function of the `isEmpty()` method.

## Code
The ```ArrayList``` class is present in the ```kotlin.collection``` package and is imported by default in every Kotlin program.

fun main(args : Array<String>) {
    val companyList = ArrayList<String>()
    
    companyList.add("Apple")
    companyList.add("Google")  
    companyList.add("Microsoft")  

    val emptyList = ArrayList<String>()
    
    println("Printing companyList elements--")  
    println(companyList)  

    println("Printing emptyList elements--")  
    println(emptyList)  

    println("Checking if companyList is empty using isEmpty() : ${companyList.isEmpty()}")
    println("Checking if emptyList is empty using isEmpty() : ${emptyList.isEmpty()}")
}

## Explanation
- First, we create an empty array list named `companyList` to store the strings.

- Next, we use the `add()` method to add a few company names to the ```ArrayList``` object, such as: ```"Google"```, ```"Apple"```, ```"Microsoft"```, and  ```"Netflix"```.
- We create another empty array list, ```emptyList```.
- Next, we call the  ```isEmpty()``` method on the `companyList` and it returns `false`, as it has few elements.
- We again call the  ```isEmpty()``` method on the `emptyList` and it returns `true`.
- The array list elements and result of `isEmpty()` method are displayed using the ```print()``` function of the ```kotlin.io``` package.


What is the ArrayList.isEmpty() method in Kotlin?

The `isEmpty()` method checks if an ArrayList in Kotlin is empty, returning true if it has no elements.

What is the ArrayList.isEmpty() method in Kotlin?

The isEmpty() method

Syntax

Arguments

Return value

Things to note

Code

Explanation

The `isEmpty()` method