Array vs arraylist in java tutorial what s the difference

in java, arrays and arraylists are both used to store collections of data, but they differ significantly in their characteristics and usage. arrays are fixed in size and can hold a predetermined number of elements of the same type. they offer fast access to elements due to their contiguous memory allocation but lack flexibility, as their size cannot be altered after creation.

on the other hand, arraylists are part of the java collections framework and provide a dynamic array that can grow or shrink in size as elements are added or removed. they can also store objects of different types, as they can hold any type of object (with generics). while arraylists offer more flexibility and built-in methods for manipulation, they come with a performance overhead compared to arrays. overall, the choice between arrays and arraylists depends on the specific requirements for data storage, access speed, and dynamic resizing.
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