Web Reference: 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, such as int, you must specify an equivalent wrapper class: Integer. 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. Mar 17, 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].
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