c++ - How to free memory allocated by native method on Java side? -


i trying pass byte array (with random data) native java , not sure if causes memory leak or not. here's c++ code.

jniexport jbytearray jnicall java_com_sample_test_jni_testjni_return_1byte_1array (jnienv *env, jobject obj) {   unsigned char *bytearray = new unsigned char[length];   srand(12345);   for(int = 0;i < length;i++) {     bytearray[i] = rand() % 64;   }   jbytearray data = (env)->newbytearray(length);   env->setbytearrayregion(data, 0, length, (jbyte*)bytearray);   delete(bytearray);   return data; }

and here's java code.

class testjni {   static {     system.loadlibrary("foobar");   }   public native byte[] return_byte_array();   public static void main(string[] args) {     byte[] data = new testjni().return_byte_array();     system.out.println("data length " + data.length);   } }

my doubt whether jbytearray allocated in native code garbage-collected java. cannot free in native side.

also, there docs describe jni memory management examples?

the java gc should clean objects allocate.

see this answer more details.


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