Convert arraylist to array – List.toArray() This is most basic way to convert an arraylist containing string values to a string array. 1. Overview In this article, You're going to learn how to convert ArrayList to String[] Array in Java. 9 year old is breaking the rules, and not understanding consequences. Thanks to this answer on this question here, I got the correct answer. Java ArrayList toArray() – Convert ArrayList to Array Learn to convert ArrayList to array using toArray() method with example. 1 2 3. Would coating a space ship in liquid nitrogen mask its thermal signature? How do I convert a String to an int in Java? addAll (list, sizes); } } Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method addAll(Collection, T...) in the type Collections is not applicable for the arguments (ArrayList, int[]) at Program.main(Program.java:14) Take a look at the below program that List object is created as new ArrayList and assigned the reference to List. There’s another method, toArray () which doesn’t take any arguments. He's asking for list-of-array-of-int, not a list-of-int. But in Java 8 it cannot store values. It uses a dynamic array for storing the objects. Asking for help, clarification, or responding to other answers. does paying down principal change monthly payments? Dec 25, 2015 Array, Core Java, Examples comments . Method 2(Using toString() method): toString() is an inbuilt method that returns the value given to it in string format. How can I access the single element of array a1 i.e. We can add or remove the elements whenever we want. ArrayList Overview. 1 Corinthians 3:15 What does "escaping through the flames" convey? Mar 16, 2017 Array, Core Java, Examples, Snippet comments . Alternatively, to decouple the two data structures: ArrayList is not the best storage for primitives such as int. toArray() method returns an array containing all of the elements in the list in proper sequence (from first to last element). Since internal implementation of ArrayList uses an array internally to store its element so ArrayList class itself provides toArray() method to convert ArrayList to array. ArrayList toArray () syntax. Object arrays works though: List