difference between vector and array list

[vidhyasagar reddy]

Hai every body

vector is synchronized and arraylist is not synchronized

can any body explain me what happens we use the vector and arraylist in the servlet.
will it produce the same o/p
or not?
if possible provide me sample code

[Ernest Friedman-Hill]

ArrayList is a replacement for Vector. Never use Vector in new code -- only use it when needed to interface with existing code that works with Vector.

I'm going to move this to Java in General (Beginner) for further discussion.

[Tony Morris]

When should I use java.util.Vector/java.util.Hashtable?
http://jqa.tmorris.net/GetQAndA.action?qids=53&showAnswers=true