HowToDoInJava

  • Python
  • Java
  • Spring Boot
  • Dark Mode
Home / Java / Collections Framework / Java ArrayList / Convert array to list in Java

Convert array to list in Java

Learn different and useful ways to convert array to list in Java. In this example, we will use Java 8 classes and Google guava library for creating an arraylist from elements of given array.

1. Convert array to list – Immutable arraylist

If you want to create an immutable arraylist instance backed by array elements then follow any given method below.

1.1. Collections.unmodifiableList()

Use Collections.unmodifiableList() to get a immutable list

String[] namesArray = new String[] {"alex", "brian", "charles", "david"};
        
List<String> namesList = Collections.unmodifiableList( Arrays.asList(namesArray) ); 

System.out.println(namesList);

Program output.

[alex, brian, charles, david]

1.2. ImmutableList.copyOf()

If you have guava library in project then you can use this method as well to get immutable list out of string array.

String[] namesArray = new String[] {"alex", "brian", "charles", "david"};
        
List<String> namesList = ImmutableList.copyOf( namesArray ); 

System.out.println(namesList);

Program output.

[alex, brian, charles, david]

2. Convert array to list – Mutable arraylist

If you want to create an mutable list instance backed by array elements then follow any given method below.

2.1. Arrays.asList()

Use Arrays.asList() to get a mutable list from a array of elements.

String[] namesArray = new String[] {"alex", "brian", "charles", "david"};
        
List<String> namesList  = Arrays.asList(namesArray) ; 

System.out.println(namesList);

Program output.

[alex, brian, charles, david]

2.2. Lists.newArrayList()

Again, if you have guava library in project then you can use this method as well to get mutable arraylist from array.

String[] namesArray = new String[] {"alex", "brian", "charles", "david"};
        
ArrayList<String> namesList = Lists.newArrayList(namesArray);

System.out.println(namesList);

Program output.

[alex, brian, charles, david]

Happy Learning !!

Read More:

A Guide to Java ArrayList
ArrayList Java Docs
Arrays Java Docs
Google Guava Docs

Was this post helpful?

Let us know if you liked the post. That’s the only way we can improve.
TwitterFacebookLinkedInRedditPocket

About Lokesh Gupta

A family guy with fun loving nature. Love computers, programming and solving everyday problems. Find me on Facebook and Twitter.

Comments are closed on this article!

Search Tutorials

ArrayList Methods

  • ArrayList – Introduction
  • ArrayList – add()
  • ArrayList – addAll()
  • ArrayList – clear()
  • ArrayList – clone()
  • ArrayList – contains()
  • ArrayList – ensureCapacity()
  • ArrayList – forEach()
  • ArrayList – get()
  • Arraylist – indexOf()
  • Arraylist – lastIndexOf()
  • ArrayList – listIterator()
  • ArrayList – remove()
  • ArrayList – removeAll()
  • ArrayList – removeIf()
  • ArrayList – retainAll()
  • ArrayList – sort()
  • ArrayList – spliterator()
  • ArrayList – subList()
  • ArrayList – toArray()

ArrayList Examples

  • ArrayList – Initialize arraylist
  • ArrayList – Iteration
  • ArrayList – Add/replace element
  • ArrayList – Add multiple elements
  • ArrayList – Check empty list
  • ArrayList – Remove element
  • ArrayList – Replace element
  • ArrayList – Empty arraylist
  • ArrayList – Synchronized arraylist
  • ArrayList – Compare two lists
  • ArrayList – Remove duplicates
  • ArrayList – Merge two lists
  • ArrayList – Serialization
  • ArrayList – Swap two elements
  • Convert ArrayList to Array
  • Convert Array to ArrayList
  • Convert HashSet to ArrayList
  • Convert LinkedList to ArrayList
  • Convert Vector to ArrayList
  • ArrayList vs LinkedList
  • ArrayList vs Vector

Java Tutorial

  • Java Introduction
  • Java Keywords
  • Java Flow Control
  • Java OOP
  • Java Inner Class
  • Java String
  • Java Enum
  • Java Collections
  • Java ArrayList
  • Java HashMap
  • Java Array
  • Java Sort
  • Java Clone
  • Java Date Time
  • Java Concurrency
  • Java Generics
  • Java Serialization
  • Java Input Output
  • Java New I/O
  • Java Exceptions
  • Java Annotations
  • Java Reflection
  • Java Garbage collection
  • Java JDBC
  • Java Security
  • Java Regex
  • Java Servlets
  • Java XML
  • Java Puzzles
  • Java Examples
  • Java Libraries
  • Java Resources
  • Java 14
  • Java 12
  • Java 11
  • Java 10
  • Java 9
  • Java 8
  • Java 7

Meta Links

  • About Me
  • Contact Us
  • Privacy policy
  • Advertise
  • Guest and Sponsored Posts

Recommended Reading

  • 10 Life Lessons
  • Secure Hash Algorithms
  • How Web Servers work?
  • How Java I/O Works Internally?
  • Best Way to Learn Java
  • Java Best Practices Guide
  • Microservices Tutorial
  • REST API Tutorial
  • How to Start New Blog

Copyright © 2020 · HowToDoInjava.com · All Rights Reserved. | Sitemap

  • Sealed Classes and Interfaces