Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to initialize an empty array list in Kotlin?
Kotlin ArrayList class can be used in order to create an empty arrayList. It would be a dynamic array which means it will automatically expand as we add data into it. An ArrayList is an ordered sequence of elements, however, unlike simple arrays, an ArrayList can contain data of multiple data types.
The function definition of arrayList goes like this −
fun <T> arrayListOf(): ArrayList<T>
It returns an empty new ArrayList. If a number is provided as the argument, then it will return an arrayList with the given elements.
Example: Initialize an empty array in Kotlin
The following example demonstrates how you can create a dynamic array list and initialize the same.
fun main(args: Array<String>) {
val myArrayList = ArrayList<String>()
println("My Empty ArrayList: " + myArrayList)
// insert elements in the ArrayList
myArrayList.add("C")
myArrayList.add("Java")
myArrayList.add("SQL")
myArrayList.add("Kotlin")
println("Elements added in the ArrayList: " + myArrayList)
}Output
On execution, it will generate the following output −
My Empty ArrayList: [] Elements added in the ArrayList: [C, Java, SQL, Kotlin]
Updated on: 16-Mar-2022
5K+ Views
Advertisements