RE: declaring static, final

Local variables are only available within the method they are
defined. Declaring a variable private is only appropriate for
global (member) variables. Global variables are defined within
the class, but outside of any method. Local variables are
defined within a method. Static says that there is only one
value in the JVM regardless of how many objects exist based
on the class. Every object created from the class will get a
copy of instance varaibles and they remain for the life of the
object. Local variables are created when a method is started
and remain only as long as the method is running (not precise
but close enough for now). Final says that the variable is
given a value when declared and the value cannot change.

A servlet is loaded on first use and an instance made. All
requests are funnled through this one instance (close enough
for now). Each request runs as a thread. Each request will
get a copy of the local variables defined in the doGet(),
doPost(),etc method. They share all of the global variables
though. The threading comes into play if you are modifying
the global variables as all requests are sharing these.

Joe

-----Original Message-----
From: owner-java400-l@midrange.com
[mailto:owner-java400-l@midrange.com]On Behalf Of Stone, Brad V (TC)
Sent: Friday, February 09, 2001 12:59 PM
To: 'JAVA400-L@midrange.com'
Subject: declaring static, final


One of my "reviewers" told me that I should declare my values that I am
reading into the servlet from a web page as static and final.

I'm having a hard time figuring out how to do this... the compiler doesn't
like my syntax.

Here's what I have now:

    String FILENAME=request.getParameterValues("filename")[0].trim();

how would I declare FILENAME as static final?

I tried: 
private static final String
FILENAME=request.getParameterValues("filename")[0].trim();

Sorry for a silly syntax question.  It does make sense why I would make it
static, but final, I'm still out on that.

What are the default access level if nothing is specified?  public? 

Brad
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