Web Reference: Mar 14, 2026 ยท The add () method in Java ArrayList is used to insert elements into the list dynamically. It allows adding elements either at the end of the list or at a specific index position. Sep 9, 2025 ยท In this comprehensive tutorial, you will learn about Javaโs List methods add() and addAll(), their performance characteristics, best practices, and modern usage patterns. The add() method adds an item to the list. If an index is provided then the new item will be placed at the specified index, pushing all of the following elements in the list ahead by one.
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