Re: how to get the return type of a Generic method

From:
Mark Space <markspace@sbc.global.net>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 20 Mar 2008 17:06:46 -0700
Message-ID:
<u_CEj.4819$qS5.1919@nlpi069.nbdc.sbc.com>
Sideswipe wrote:

This results in "class java.lang.Object" as I suspected it would (I
had to try). is there a way (without adding a parameter) to determine
this?? This is legacy code and while I have access to it, I have
limited flexibility as to what i can do.


If it's legacy code, how did they get the run type before? I think your
best bet is to rethink the problem...

However:

public class SomeClass<T> {

      public T getValue(Object whatever) {
      }

}

public static void main(String[] args) {

   SomeClass<String> instance = new SomeClass<String>();

   // For input use whatever works...
   Object obj = instance.getVale( null );
   Class class = obj.getClass()
   System.out.println( class.getName() );

}

If you truly don't know, this is the only way I can think of, is to
actually obtain an object, and query it's class.

If that can't work, then I think you are going to have to refactor the
code and pass a class object in as a parameter when you create the class.

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