performance of vector and synchronized arrayList

[srinivas sy]

Difference b/w these 2.

List list = Collections.synchronizedList(new ArrayList());

now arraylist also Synchronized.




As we vector also synchronized and arraylist explicity we synchronized.

Is there any diff we see here??

[Winston Gutkowski]

srinivas sy wrote:Is there any diff we see here??

Probably not now, since Vector has been retro-fitted to implement the List interface (it didn't originally).

It is however possible that Vector's synchronization might be slightly more "refined". Collections.synchronizedList() simply wraps a List in an object that synchronizes ALL its methods, whereas Vector's might be a bit more "tailored" - but you basically have no way of knowing without looking at the source code.

However, as I pointed out in your other thread: Vector is a "legacy" class and, as such, its use it generally discouraged.

Winston