List<String> x = new ArrayList<String>(Arrays.asList("xyz", "abc")); It's a good practice to declare the ArrayList with interface List if you don't have to invoke the specific methods.

Oct 11, 2015 · ArrayLists have no default values. If you give the ArrayList a initialCapacity at initialization, you're just giving a hint for the size of the underlying array—but you can't actually access the values in the ArrayList until you add the items yourself.

Apr 7, 2025 · Below are the various methods to initialize an ArrayList in Java. 1. Initialization with add () Syntax: ArrayList<Type> al= new ArrayList<Type> (); al.add (“Geeks”); al.add (“for”); al.add (“Geeks”); Example 1: This example demonstrates how to …

Jan 8, 2024 · Throughout our exploration, we have examined two methods for initializing a list with default values: using Arrays.fill(), leveraging our self-made newListWithDefault() method. We have used the immutable type String for our list elements as examples for simplicity.

Jan 11, 2021 · We can Initialize ArrayList with values in several ways. Let’s see some of them with examples. We can use Arrays.asList() method and pass it to ArrayList’s constructor to initialize ArrayList with values in java. This approach is useful when we already have data collection. Output:

Apr 21, 2023 · In this article, you'll learn how to declare and initialize an ArrayList in Java. You'll see the different in-built methods that can be used to add, access, modify, and remove elements in an ArrayList. Let's get started! How To Declare an ArrayList With Values in Java

Learn how to initialize a Java ArrayList with default values like zeros, along with tips and common mistakes.

May 28, 2020 · Java developers use the Arrays.asList() method to initialize an ArrayList. Using asList() allows you to populate an array with a list of default values. This can be more efficient than using multiple add() statements to add a set of default values to an ArrayList.

Feb 1, 2024 · There is a basic way to declare an ArrayList with values is by Adding elements one by one by using the add() method. Syntax: ArrayList<Integer> arrayList = new ArrayList<>();arrayList.add(1);arrayList.add(2);

But don't worry, there is a workaround to declare an ArrayList with values e.g. String, integers, floats, or doubles by using the Arrays.asList () method, which is nothing but a shortcut to convert an Array to ArrayList. This is how you declare an ArrayList of Integer values.