Junior
Which is faster: ArrayList or LinkedList?
sobes.tech AI
Answer from AI
ArrayList works faster when it comes to random access to elements (getting an element by index) because the elements are stored as an array in a contiguous memory area.
LinkedList is faster for inserting or deleting elements in the middle of the list, as it only requires updating the links of neighboring elements, rather than shifting all subsequent elements as in ArrayList.
| Operation | ArrayList | LinkedList |
|---|---|---|
| Get | O(1) | O(n) (worst case) |
| Insert/Delete at the end | O(1) in practice, O(n) in the worst case (when resizing) | O(1) |
| Insert/Delete in the middle | O(n) | O(1) (with known iterator), O(n) (when searching) |