difference between array and arraylist in java with example
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sure! in java, both arrays and arraylists are used to store collections of data. however, they have some key differences in terms of flexibility, functionality, and performance. below is an informative tutorial on the differences between arrays and arraylists in java, along with code examples.
1. definition
**array**: an array is a fixed-size data structure that can hold a collection of elements of the same type. once an array is created, its size cannot be changed.
**arraylist**: an arraylist is a part of the java collections framework and is a resizable array that can hold a collection of objects. it can grow and shrink dynamically as elements are added or removed.
2. size
**array**: the size of an array is fixed at the time of creation. you cannot add or remove elements after its size has been defined.
**arraylist**: the size of an arraylist is dynamic. you can add or remove elements, and the arraylist will adjust its size automatically.
3. type of elements
**array**: can hold both primitive types (like `int`, `char`, etc.) and objects.
**arraylist**: can only hold objects. to store primitive types, you must use their corresponding wrapper classes (e.g., `integer` for `int`, `character` for `char`).
4. performance
**array**: generally faster for accessing elements because of its fixed size and contiguous memory allocation.
**arraylist**: slightly slower for accessing elements due to the overhead of dynamic resizing and additional features like automatic resizing and bounds checking.
5. methods and functionality
**array**: has no built-in methods for common operations like searching, sorting, etc.
**arraylist**: provides various built-in methods for adding, removing, and manipulating elements (e.g., `add()`, `remove()`, `get()`, `size()`, etc.).
code examples
here's a comparison of using an array and an arraylist in java:
example using array
example using arraylist
summary of differences
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