Web Reference: 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. Feb 2, 2026 · Explanation: An ArrayList of type String is created and elements are added to it, including a duplicate value. The output shows that ArrayList maintains insertion order and allows duplicate elements. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one).
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