See the Wolfgang post.
.V
Sgarlata Matt wrote:
OK, I understand now. That makes sense. Thanks for your help, Craig & Richard!
Matt
----- Original Message ----- From: "Yee, Richard K,,DMDCWEST" <[EMAIL PROTECTED]>
To: "'Struts Users Mailing List'" <[EMAIL PROTECTED]>
Sent: Tuesday, December 23, 2003 3:37 PM
Subject: RE: Example of a non-threadsafe Action?
Matt, A final declaration just means that the reference can't be changed to a different SimpleDateFormat instance. A static declaration just means that there is one instance of the variable for all of the instances of the
class.
Neither modifier affects how the SimpleDateFormat uses internal instance variables.
-Richard
-----Original Message----- From: Sgarlata Matt [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 23, 2003 11:40 AM To: Struts Users Mailing List Subject: Re: Example of a non-threadsafe Action?
What if the SimpleDateFormat variable is declared as final and/or static?
Thanks,
Matt
----- Original Message ----- From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <[EMAIL PROTECTED]>; "Nifty
Music" <[EMAIL PROTECTED]>
Sent: Tuesday, December 23, 2003 2:35 PM
Subject: RE: Example of a non-threadsafe Action?
Quoting Nifty Music <[EMAIL PROTECTED]>:
Thanks Craig! You certainly confirmed my suspicions, although I would
have
guessed that I could've gotten away with sharing the SimpleDateFormat variable since it wouldn't depend on any values coming in from request objects. Could you perhaps shed some light on why it wouldn't make
sense to
share it?
Because the internal implementation of SimpleDateFormat uses instance
variables
during parsing and formatting, so it's not thread safe :-).
Craig
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