Hi! Im working on a project
that involves the use of JNI.

My question goes this way. I have to call a C++ function that stores information
on a parameter.

				

				m_pMedMp->GET_BalanceInfo(o_eBalanceAry);
				

			

The function GET_BalanceInfo
retrieves balance information and stores it in o_eBalanceAry. o_eBalanceAry
is defined as structure whose definition is below.

				

				struct {
				

				

				unsigned char ucCategory; // (Category)
				

				

				unsigned char ucBalance[4]; // (Balance)
				

				

				} ENBalance;
				

			

I made a java class that
implements this struct.

				

				class ENBalance {
				

				

				char ucCategory;
				

				

				char ucBalance[];
				

				

				/** Creates new ENBalance*/
				

				

				public ENBalance() {
				

				

				ucBalance = new char[4];
				

				

				}
				

				

				}
				

			

After that ive implemented
the JNI of the GET_BalanceInfo function. My problem is how do i access ENBalance's
member array variable ucBalance? I have no problems accessing and assigning
values to ucCategory. Here's the code

			

			JNIEXPORT void JNICALL
			

			Java_JmedMultiPockets_GET_1BalanceInfo (JNIEnv *env, jobject obj, jobject o_pBalanceAry){
			

		

				

				jclass cls = env->GetObjectClass(o_pBalanceAry);
				

				

				jfieldID fid;
				

				

				ENCardInfo m_eCardInfo;
				

			

				

				// C++ implementation
				

				of Get Balance info here//
				

				

				m_pMedMp->GET_BalanceInfo(o_eBalanceAry);
				

				

				

				

				// setting of ENBalance on java class //
				

				

				ucCategory fid = env->GetFieldID(cls, "ucCategory", "C");
				

				

				if (fid != 0) {
				

				

				env->SetCharField(obj, fid, o_eBalanceAry.ucCategory);
				

			

I hope to hear from anyone
soon. Thanks in advance!

Mao Ronan