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Groups > comp.lang.java.programmer > #8519

Re: JNI generic type of jobject

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On 10/04/2011 02:23 PM, Philipp Kraus wrote:
> Hello,
>
> I use JNI calls for some Java classes. Some Java classes are generic
> classes like:
>
> class mytestclass<T> {
>
> public native void mymethod();
>
> }
>
> The stub shows:
>
> JNIEXPORT void JNICALL Java_mytestclass_mymethod(JNIEnv* p_env, jobject
> p_object)
>
> How can I get from the jobject which object type is the generic
> parameter T? Because I would
> like to create different codes if I do something like:
>
> mytestclass<int> x = new mytestclass<int>();
> x.mymethod();
>
> mytestclass<String> x = new mytestclass<String>();
> x.mymethod();
>
> Thanks
>
> Phil
>
>

No such thing is possible. Generics are a compile time thing. At runtime 
only the raw types are available.

Silvio

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Thread

JNI generic type of jobject Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-04 14:23 +0200
  Re: JNI generic type of jobject Silvio <silvio@moc.com> - 2011-10-04 14:28 +0200
    Re: JNI generic type of jobject Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-04 14:49 +0200
    Re: JNI generic type of jobject Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-10-04 07:53 -0700
      Re: JNI generic type of jobject Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-04 18:01 +0200
      Re: JNI generic type of jobject Lew <lewbloch@gmail.com> - 2011-10-04 12:01 -0700
        Re: JNI generic type of jobject Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-10-04 12:15 -0700

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