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Answer to Question #19854 in Java | JSP | JSF for nohra

Question #19854
11-9. As we add objects to an ArrayList, how can we be sure it has enough capacity?
Expert's answer
Each ArrayList instance has a capacity. The capacity is the size of the array used to store the elements in the list. It is always at least as large as the list size. As elements are added to an ArrayList, its capacity grows automatically. The details of the growth policy are not specified beyond the fact that adding an element has constant amortized time cost.

An application can increase the capacity of an ArrayList instance before adding a large number of elements using the ensureCapacity operation. This may reduce the amount of incremental reallocation.

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