From: blmblm@myrealbox.com <blmblm.myrealbox@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Passing a Method Name to a Method
Date: 23 Jun 2011 17:49:43 GMT
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In article <ittm03$u36$1@dont-email.me>, markspace  <-@.> wrote:
> On 6/22/2011 12:46 PM, Gene Wirchenko wrote:
> > Dear Jav'ers:
> >
> >       Maybe I will find this after searching more, but so far, no good.
> >
> >       I want to pass a parameter of a method name to another method.
> 

[ snip ]

> You can also do similar things with Runnable or Callable, which just 
> avoids declaring a type.  Since declaring a type isn't that big of a 
> deal, this is usually poor solution unless you are in fact spawning 
> threads and using the concurrency API directly.
> 
> public class Parser {
>    final private Runnable parser;
>    public Parser( Runnable parser ) {
>      this.parser = parser;
>    }
>    public parse() {
>      parser.run();
>    }
> }
> 
> You might call this with an anonymous class rather than declaring a yet 
> another type, however again that might not really be worth it.  I'm 
> drawing a blank here how to pass in arguments to the run method, 

I don't think you can, can you?  (Someone will probably be along
shortly to correct me if I'm wrong.  Sort of a :-). )

> so I'll 
> cheat:
> 
>    Parser p = new Parser( new Runnable() {
>        private final Reader in = System.in;
>        public void run() {
>          new JavaLanguage.doIt( in );
>        }
>      } );
>    p.parse();  // parse stdin

I think this is about the best you can do if you insist on (ab)using [*]
an interface whose methods don't have the parameters you want.

[*] Not that I've ever done anything like that.  (Ha.)

[ snip ]

-- 
B. L. Massingill
ObDisclaimer:  I don't speak for my employers; they return the favor.