Example. Create an ArrayList object called cars that will store strings: import java.util.ArrayList; // import the ArrayList class ArrayList<String> cars = new ArrayList<String>(); // Create an ArrayList object

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.

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>();

ArrayList is a resizable array implementation of the List interface in Java. It provides dynamic array capabilities, which means it can grow and shrink as needed. This tutorial will cover all methods of ArrayList with examples and outputs.

Jul 19, 2015 · 1) Explain the different ways of constructing an ArrayList? ArrayList can be created in 3 ways. a) ArrayList () —> It creates an empty ArrayList with initial capacity of 10. b) ArrayList (int initialCapacity) —> It creates an empty ArrayList with supplied initial capacity.

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.

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 resides within Java Core Libraries; therefore, we don’t need additional libraries. To use it, we add its import statement:

Nov 6, 2023 · We can create an arraylist in different ways under different scenarios.

In this tutorial, we will explore the ArrayList class in Java, which is a part of the List interface. Unlike LinkedList, ArrayList provides better performance for random access operations compared to add and remove operations.

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. Most operations that can be run on ArrayList such as size, isEmpty, get, set, iterator and listIterator are all constant time.