Mar 12, 2025 · ArrayList is a Java class implemented using the List interface. Java ArrayList, as the name suggests, provides the functionality of a dynamic array where the size is not fixed as an array. Also, as a part of Collections framework, it has many features not available with arrays. Syntax of ArrayList. ArrayList<Integer> arr = new ArrayList<Integer>();

In Java, we use the ArrayList class to implement the functionality of resizable-arrays. It implements the List interface of the collections framework . In Java, we need to declare the size of an array before we can use it. Once the size of an array is declared, it's hard to change it. To handle this issue, we can use the ArrayList class.

The ArrayList class is a resizable array, which can be found in the java.util package. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one).

Jul 19, 2015 · 18 Java ArrayList Programming Examples. 1) Explain the different ways of constructing an ArrayList?

Mar 12, 2024 · In Java, an ArrayList is a resizable array implementation of the List interface provided by the Java Collections Framework. It's part of the java.util package. Unlike arrays, which have a fixed size, ArrayList can dynamically grow and …

This blog post will teach you 15+ ArrayList Java programs with output and step-by-step explanations. 1. Java Program to Add Elements to an ArrayList. In this program, we use the add (E e) method to add elements to the ArrayList and the add (int index, E element) method to add an element at a specific index. 1. Create an ArrayList. 2.

Dec 20, 2024 · The ArrayList class in Java is part of the java.util package and provides a resizable array implementation. Unlike regular arrays in Java, which have a fixed size, an ArrayList can dynamically grow or shrink as needed.

Nov 6, 2023 · The Java ArrayList represents a resizable array of objects which allows us to add, remove, find, sort and replace elements. The ArrayList is part of the Collection framework and implements in the List interface. 1. Introduction to Java ArrayList. 1.1. What is an ArrayList?

Jan 16, 2025 · In this tutorial, we have listed the top 12 ArrayList programs in Java for the best practices that will help you improve your coding skills. All the ArrayList programs with explanation are based on the various operations, such as adding, removing, accessing, updating elements, etc.

Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store the list.