Groups > comp.lang.java.programmer > #7702

Re: Define Type at runtime

From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Define Type at runtime
Date	2011-09-08 08:12 -0700
Organization	http://groups.google.com
Message-ID	<3d05f689-fd75-4ccd-8fd4-8e41b12f736a@a12g2000yqi.googlegroups.com> (permalink)
References	<4e678737$1@news.x-privat.org> <4e678ab5$0$13073$426a74cc@news.free.fr> <4e678d02$2@news.x-privat.org>

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On 7 Sep., 17:25, John <j...@yahoo.com> wrote:
> Il 07/09/2011 17:20, Mayeul ha scritto:
>
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> > On 07/09/2011 17:01, John wrote:
> >> If I have a method:
> >> public void someMethod(Object o){
> >> ...
> >> Entity<T> entity;
> >> ....
> >> }
>
> >> How could I define at runtime the type T if I have an Object?
>
> > You can't. Generics are a compile-time-only tool. They are erased at
> > runtime.
>
> > You need to organize your program so that type-safety is checked
> > entirely at compile-time. Or, if impractical, to just renounce
> > type-safety and work with something like Entity<?> instead.
>
> Ok, solved.
> Thank you

Just curious, how did you solve it?

Cheers

robert

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Thread

Define Type at runtime John <john@yahoo.com> - 2011-09-07 17:01 +0200
  Re: Define Type at runtime Mayeul <mayeul.marguet@free.fr> - 2011-09-07 17:20 +0200
    Re: Define Type at runtime John <john@yahoo.com> - 2011-09-07 17:25 +0200
      Re: Define Type at runtime Robert Klemme <shortcutter@googlemail.com> - 2011-09-08 08:12 -0700
        Re: Define Type at runtime John <jonh@yahoo.com> - 2011-09-09 09:01 +0200
          Re: Define Type at runtime Robert Klemme <shortcutter@googlemail.com> - 2011-09-09 04:47 -0700
  Re: Define Type at runtime Lew <lewbloch@gmail.com> - 2011-09-08 09:32 -0700
    Re: Define Type at runtime BGB <cr88192@hotmail.com> - 2011-09-08 11:07 -0700
      Re: Define Type at runtime Lew <lewbloch@gmail.com> - 2011-09-08 11:25 -0700
        Re: Define Type at runtime BGB <cr88192@hotmail.com> - 2011-09-08 14:20 -0700
          Re: Define Type at runtime Lew <lewbloch@gmail.com> - 2011-09-08 14:35 -0700
            Re: Define Type at runtime BGB <cr88192@hotmail.com> - 2011-09-08 14:54 -0700
              Re: Define Type at runtime Lew <lewbloch@gmail.com> - 2011-09-08 17:10 -0700
                Re: Define Type at runtime BGB <cr88192@hotmail.com> - 2011-09-09 00:32 -0700
      Re: Define Type at runtime John <jonh@yahoo.com> - 2011-09-09 09:02 +0200

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