CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

Just a thought question here. In C++, I could do the following: vector<vector<string> > data; // add data into data //.. data[0].push_back( "somedata" ); And I would expect somedata to get written to the vector array because the [] notation gives me access to the object by reference. What about in Java? If I: List<List<String>> data = new ArrayList<List<String>>(); // add data into data //.. data.get(0).add( "somedata" ); Would this actually write somedata into the data object? Or would it create a new copy of the element at data(0), add somedata to that, and then that object disappears into GC sometime down the line?

How do two values I pass into my JNI tossed down to C then C does its changes and updates the values. How do I get those two values(maxPower, index) and see then in Java? They always come back as zero. JNIEXPORT jdouble JNICALL Java_com_TV ( JNIEnv* env, jobject obj, jdouble maxPower, jint index) { jdouble result = 0; result = Feature_TV(2, &maxPower, &index ); return result; } // here is the c function it calls it actually does more than this but for // demo it should return result 60 and maxPower and index should be -5.0 and -2.. double Feature_TV(double * maxPwr, int * maxPwrIdx ) { *maxPwr = -5.0; *maxPwrIdx = -2; /// do something return 60; }