Groups > comp.lang.java.programmer > #7683

Re: Define Type at runtime

Date	2011-09-07 17:25 +0200
From	John <john@yahoo.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Define Type at runtime
References	<4e678737$1@news.x-privat.org> <4e678ab5$0$13073$426a74cc@news.free.fr>
Message-ID	<4e678d02$2@news.x-privat.org> (permalink)
Organization	X-Privat.Org NNTP Server - http://www.x-privat.org

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Il 07/09/2011 17:20, Mayeul ha scritto:
> 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

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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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