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 …

An ArrayList keeps elements in the same order you add them, so the first item you add will be at index 0, the next at index 1, and so on.

Apr 24, 2026 · ArrayList in Java is a resizable array provided in the java.util package. Unlike normal arrays, its size can grow or shrink dynamically as elements are added or removed.

Dec 14, 2024 · In this tutorial, we’ll look at the ArrayList class from the Java Collections Framework. We’ll discuss its properties, common use cases, and advantages and disadvantages.

ArrayList supports dynamic arrays that can grow as needed. Standard Java arrays are of a fixed length. After arrays are created, they cannot grow or shrink, which means that you must know in advance …

Apr 21, 2026 · ArrayList is the most widely used collection class in Java. It's a resizable array that grows automatically as you add elements, with fast random access and a rich API.

Nov 16, 2021 · To use ArrayList, the concept of generic programming is needed. Simply speaking, you can think of generic programming as working with a general type T, where T can be replaced by any …