Re: Newbie question - Final classes

[kulack@xxxxxxxxxx]

> Would you really want a programmer to sub-class this class ? probably not
!

Uh...
Its perfectly reasonable to _WANT_ to sub-class string.


HOWEVER....
My understanding of final is...
Using final classes is really related to optimizations.
Similar to final objects, the JVM, various JITs can do some good
optimizations if they know for sure that an instance of String is
really ONLY a string, and not some derived class.

I.e. toString() always calls String.toString() and NEVER
StringSubClass.toString().
Strings are primitive enough types and used frequently enough
that these optimizations are probably important.



"Do you believe that my being stronger or faster has anything
 to do with my muscles in this place?" ... "Free your mind."
Laurence Fishburne as Morpheus in 'The Matrix'.

Fred A. Kulack  -  AS/400e  Java and Java DB2 access, Jdbc, JTA, etc...
IBM in Rochester, MN  (Phone: 507.253.5982   T/L 553-5982)
mailto:kulack@us.ibm.com   Personal: mailto:kulack@bresnanlink.net
AOL Instant Messenger: Home:FKulack  Work:FKulackWrk



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