Web Reference: Jul 11, 2025 · The clear () method in the ArrayList class in Java is used to remove all elements from an ArrayList. After calling this method, the list becomes empty. Example 1: Here, we will use the clear () method to clear elements from an ArrayList of Integers. data.clear() is supposed to remove everything for you, but keep the array. The size goes back to zero, though, so you wouldn't start at 11, you'll start at 0. Mar 28, 2026 · Clearing an ArrayList in Java is a common operation that can be done in several ways. The clear() method is the most straightforward and efficient approach, but reinitializing the list or removing elements one by one can also be used in certain situations.
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