JNI - Getting a double array form Java

[Edsoncv]

Hello
I'm trying (without sucess ) to get a double array form Java using
JNI.
My function (in C++) calls "CallDoubleMethod" but put trash in my "C"
double array. I'm doing somethig wrong but I don't know what. I check
the values from Java and it is being calculated perfectly, I think the
problem is in the array association (since I'm not a experienced
programmer). Below is my code.

jdouble *jacj = new jdouble[n];
.....
get class
get method id
get object and so on...

*jacj = env->CallDoubleMethod(res_gradObj, getdataMetID);

I'm almost sure that the problem is in the last line. Can someone
please help me?
Thanks

 

[Edsoncv]

I forgot to say that my function in Java returns a double array.
Thanks

 

[Gordon Beaton]

I'm trying (without sucess ) to get a double array form Java
using JNI. [...]
*jacj = env->CallDoubleMethod(res_gradObj, getdataMetID);

I'm almost sure that the problem is in the last line. Can someone
please help me?

"Array of double" is not a primitive type. Use CallObjectMethod()
instead:

jdoubleArray jacj = CallObjectMethod(...);

/gordon

 

[Edsoncv]

Ok, it worked. Thanks again.!!

I'm trying (without sucess ) to get a double array form Java
using JNI. [...]
*jacj = env->CallDoubleMethod(res_gradObj, getdataMetID);

I'm almost sure that the problem is in the last line. Can someone
please help me?

"Array of double" is not a primitive type. Use CallObjectMethod()
instead:

jdoubleArray jacj = CallObjectMethod(...);

/gordon