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.

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.

May 12, 2026 · Explanation: This program creates an ArrayList of integers, adds elements to it using the add () method, and stores them dynamically. Finally, it prints the elements in insertion order as [1, 2, 3].

Jan 16, 2026 · This blog post will delve into the fundamental concepts of ArrayList, its usage methods, common practices, and best practices to help you gain an in-depth understanding and use it efficiently.

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...

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 …

This tutorial will cover all methods of ArrayList with examples and outputs. Additionally, it will highlight key points, use cases, best practices, performance considerations, and a real-time example.

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.

May 21, 2025 · This resource offers a total of 110 Java ArrayList problems for practice. It includes 22 main exercises, each accompanied by solutions, detailed explanations, and four related problems.

Jul 19, 2015 · Using contains () method of ArrayList, we can examine whether the ArrayList contains the given element or not. This method returns true if ArrayList has that element otherwise returns false.