ArrayList and LinkedList both implement the List interface and maintain insertion order. Both are non-synchronized classes.
There are many differences between the ArrayList and LinkedList classes that are stated below.
| ArrayList | LinkedList |
|---|---|
| ArrayList internally uses a dynamic array to store the elements. | LinkedList internally uses a doubly linked list to store the elements. |
| Manipulation with ArrayList is slow because it internally uses an array. If any element is removed from the array, all the other elements are shifted in memory. | Manipulation with LinkedList is faster than ArrayList because it uses a doubly linked list, so no bit shifting is required in memory. |
| An ArrayList class can act as a list only because it implements List only. | LinkedList class can act as a list and queue both because it implements List and Deque interfaces. |
| ArrayList is better for storing and accessing data. | LinkedList is better for manipulating data. |
| The memory location for the elements of an ArrayList is contiguous. | The location for the elements of a linked list is not contagious. |
| Generally, when an ArrayList is initialized, a default capacity of 10 is assigned to the ArrayList. | There is no case of default capacity in a LinkedList. In LinkedList, an empty list is created when a LinkedList is initialized. |
| To be precise, an ArrayList is a resizable array. | LinkedList implements the doubly linked list of the list interface. |