Elements in an ArrayList are actually objects. In the examples above, we created elements (objects) of type "String". Remember that a String in Java is an object (not a primitive type). To use other types, …

The ArrayList class is used to implement resizable-arrays in Java. In this tutorial, we will learn about the ArrayList class and its methods with the help of examples.

Nov 18, 2025 · An ArrayList in Java is a resizable (or dynamic) array from the java.util package that can grow or shrink automatically as elements are added or removed, unlike regular arrays with a fixed size.

Sep 16, 2025 · An ArrayList in Java is a resizable array from the java.util package. Unlike normal arrays, which have a fixed size, an ArrayList can grow or shrink dynamically when elements are added or...

Dec 14, 2024 · In this quick article, we had a look at the ArrayList in Java. We showed how to create an ArrayList instance, and how to add, find, or remove elements using different approaches.

Apr 1, 2025 · This Tutorial Explains How to Declare, Initialize & Print Java ArrayList with Code Examples. You will also learn about 2D Arraylist & Implementation of ArrayList in Java: Java …

May 21, 2019 · Java ArrayList class is a resizable array that implements the List interface. It permits all elements, including null and also implements all optional list operations.

Nov 12, 2025 · This blog post will delve into the fundamental concepts, usage methods, common practices, and best practices of ArrayList in Java, accompanied by clear code examples.

This example demonstrates how to create an ArrayList, add elements, remove elements, check the size, and verify the presence of elements. This practical example will solidify your understanding of …

Oct 1, 2025 · Suppose you have an ArrayList, and want to keep (or retain) only certain elements in it. With retainAll we can specify a list of elements to keep—all the rest are removed.