Creating array of object

Question

Using JNI, I'm trying to pass an array of object from the C native side to
the Java side. I have the following code:
JNIEXPORT jint JNICALL Java_classA_methodB(
JNIenv *env,
jobject obj,
jobjectArray objArr )
jclass objClass = ( *env )->FindClass( env, "arrObjClass" );
jmethodID methodID = ( *env )->GetMethodID( env, objClass, "<init>", "()V" ); // Default constructor
jobject objElement = ( *env )->NewObject( env, objClass, methodID );
// ... Fill objElement with values
( *env )->SetObjectArrayElement( env, objArr, 0, objElement ); // <-- program core dumps here.  WHY? 
return 1;
The program core dumps at the line above and I don't understand why?
objArr is originally set to null when pass to the native function. Does
objArr have to be allocated using new before pass to the native function?
Thank you in advance,
Duong

Answer 1

You seem to be trying to write into an array passed as an input argumenet, when you haven't in fact passed an array object.
(At least that's what I interpreted you to say what you are doing.)
Either construct an array in java and pass it to C++, or if that is probelmatic, then change the C++ return object from an int to an array, and do the construction in C++.