Web Reference: 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. 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]. 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 to manipulate the size of the array that is used internally to store the list.
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