From Java 10, you can use the var keyword to declare an ArrayList variable without writing the type twice. The compiler figures out the type from the value you assign.

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 …

3 days ago · 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.

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.

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.

Sep 16, 2025 · ArrayList is essentially a dynamic wrapper over a normal array. Internally, ArrayList uses an Object[] array: If you create an ArrayList without specifying capacity: It starts with a default...

Nov 12, 2025 · In this example, we create an ArrayList named numbers that can store elements of type Integer. The <> is called the diamond operator, which was introduced in Java 7 to simplify the …