ArrayList vs LinkedList: Which One Should I Use?

What's the difference between ArrayList and LinkedList in Java?

ArrayList is backed by a dynamic array, while LinkedList is a doubly-linked list. This affects performance and memory.

When should I use LinkedList over ArrayList?

Use LinkedList when you need frequent insertions and deletions, as it performs better in those scenarios.

Are there any performance trade-offs I should be aware of?

Yes, ArrayList has faster access times (O(1)) for indexed access, while LinkedList has O(n) for accessing elements.

What about memory usage between the two?

ArrayList uses less memory per element, but LinkedList has overhead due to storing pointers for each node.