Re: How do you declare JSP variables as "final"?

From:

Mark Space <markspace@sbc.global.net>

Newsgroups:

comp.lang.java.help,comp.lang.java.programmer

Date:

Fri, 29 Feb 2008 13:16:17 -0800

Message-ID:

<DC_xj.5362$Mh2.1019@nlpi069.nbdc.sbc.com>

phillip.s.powell@gmail.com wrote:

<%

MailAdminReader mar = new MailAdminReader();
boolean hasMail = false;

But here's the problem: they're in a JSP. How in the world do I
declare these variables "final" when there is no class reference that
can be declared final? DO I use a block or can I? I am lost here.

I haven't sussed this all out, but a few things occur to me.

First, final is legal for local variable declarations. Can you just add
final before "MailAdminReader mar = ..."?

Second, there's an obvious place to add a final variable to the
anonymous class itself.

Thread t = new Thread(new Runnable() {
    final MailAdminReader mar2; // = etc. <--- new line
    public void run() {
       try {
          hasMail = mar2.checkForMail(); // <- changed
       } catch (Exception e) {
  // etc.

Third you can always declare a method in your JSP for the purpose of
making the parameter final:

<%!
   private void someMethod( final MailAdminReader mar2 ) {
     Thread t = new Thread( new Runnable() {
      // etc. use mar2 not mar...
      }
   }
%>

<% someMethod( mar ); %>

Sorry I don't work with anonymous classes enough to get exactly the
right one for you, but that should give you some ideas anyway....