RE: Vector of a vector?

["Anand, Rajesh" <Rajesh_Anand@xxxxxx>]

Is there a good resource where I can learn more about vectors?

        Thanks in advance,

Rajesh Anand
Mob: + (44) (0) 7947273151
Email:Rajesh_anand@xxxxxx


-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of
SRamanujan@xxxxxxxxxxxxxxxxxx
Sent: 28 March 2005 23:30
To: java400-l@xxxxxxxxxxxx
Subject: RE: Vector of a vector?


Thanks Joe.

I just read the documentation and the difference is the Vector is
synchronized and ArrayList is not and for multi threaded environment,
you can write a synchronized wrap around as:
List list = Collections.synchronizedList(new ArrayList());
(This decreases the performance slightly.)  
Thanks,
Sudha

Sudha Ramanujan
SunGard Futures Systems
sramanujan@xxxxxxxxxxxxxxxxxx
(312) 577 6179
(312) 577 6101 - Fax


-----Original Message-----
From: Joe Pluta [mailto:joepluta@xxxxxxxxxxxxxxxxx] 
Sent: Monday, March 28, 2005 4:02 PM
To: 'Java Programming on and around the iSeries / AS400'
Subject: RE: Vector of a vector?

Sudha, I'm pretty sure Vector will always be supported.  I see nothing
in any of the documentation suggesting it is deprecated.  Thus, any
application server will always support a Vector.  However, the ArrayList
class is easier to use and might even have some performance benefits;
the only problem is that the ArrayList is not available prior to Java
version 1.2.  Older JDKs will not support it.

Joe

> From: SRamanujan@xxxxxxxxxxxxxxxxxx
> 
> I am not sure if a vector is better.  I think the vector and ArrayList
> works the same way where the elements are added and removed.  But a
> Vector implementation may not be supported in all the application
> servers reducing the portablity.  So it is usually recommended to use
an
> ArrayList more so, a List, which can be implemented as an ArrayList.

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