len = (*env)->GetArrayLength(env,bOldArray);
char *oldBuff = (char *)calloc(sizeof(char),MAX_SIZE);
jbyte* bytes = (*env)->GetByteArrayElements(env,bOldArray,0);
memcpy(oldBuff,bytes,len);
(*env)->ReleaseByteArrayElements(env,bOldArray,(jbyte *)bytes,0);