What is the difference between ArrayList and Vector?

[Sandeep Mukherji]

What is the difference between ArrayList and Vector?
is it only that:
i) Vector is thread- safe and ArrayList is not. and
ii) Vector objects suffer a slight performance panelty due to synchronization.
or something more?

[Guido Sautter]

That's basically it.
Plus, Vector provides some additional methods.
In fact, Vector was retro-fitted to implement the List interface in Java 1.2 (from the Java API documentation):
"As of the Java 2 platform v1.2, this class has been retrofitted to implement List, so that it becomes a part of Java's collection framework. Unlike the new collection implementations, Vector is synchronized."

[Sandeep Mukherji]

Thanks a Lot.