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Re: NSSelector<T> - a curiosity
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Re: NSSelector<T> - a curiosity


  • Subject: Re: NSSelector<T> - a curiosity
  • From: Ricardo Parada <email@hidden>
  • Date: Wed, 7 May 2008 10:20:31 -0700

Maybe something like the this?

	 NSSelector<?> selector = new NSSelector<?>("testMethod");




On May 7, 2008, at 12:35 AM, Michael Scott wrote:

NSSelector<Object> works fine.  But it is a bit wonky.

Perhaps Java should allow 'null' as a type argument.

Probably a bit much to ask just to make an old NextStep class more
consistent.


On 7/5/08 2:11 PM, "Anjo Krank" <email@hidden> wrote:

Try to cheat an use <Object>?

Am 07.05.2008 um 04:12 schrieb Michael Scott:

NSSelector has been generified (generifried?) so that the return
type of the method it calls must be specified as a type parameter.

So,
   NSSelector<String> selector = new
NSSelector<String>(“testMethod”);

Can be used to call the following method which returns a String
(regardless on what class the method resides):

   public String testMethod() {
       return “testing, testing, 1, 2, 3 ...”;
   }

But what if the method returns void?

   public void testMethod2() {
       // do something fab
   }

What type argument should be used to instantiate NSSelector<T>?

Or have I missed something fundamental?

Cheers
Michael Scott



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