Need assistance on this Java assignment.

/* This class encapsulates a list of movies in a user's collection. * The list is implemented as an array of type Movie. * Each movie is represented by an instance of the Movie class. */ public class MovieList { //Class member variable declarations: // TODO: Put your declarations here.

/* Constructor that initializes the member variables. The array is * created using the initial length passed in to the constructor. * The initialLength is assigned to the initial length passed in to the constructor. * The numMovies is initialized to 0. * Any other member variables are initialized as well. */ public MovieList(int initialLen){ // TODO: Implement this method. } /* Add the newMovie passed in to the next available cell in the movieList. * Available (empty) cells have the value NULL. The numMovies variable may be used * to keep track of the index of the next available cell. * For example, if the list contained: item1, item2, NULL, NULL, * the next available cell is at index 2. */ public void addMovie(Movie newMovie){ // TODO: Implement this method. }

/* This method returns an array that contains only Movie objects whose * title matches the targetTitle passed in. * The array returned does not contain any NULL values. * This method returns an array of length 0 if there are no matches. * This method may call the getOnlyItems method. */ public Movie[] findMoviesByTitle(String targetTitle){ // TODO: Implement this method. return null; } /* This method returns an array that contains only Movie objects whose * genre matches the targetGenre passed in. * The array returned does not contain any NULL values. * This method returns an array of length 0 if there are no matches. * This method may call the getOnlyItems method. */ public Movie[] findMoviesByGenre(String targetGenre){ // TODO: Implement this method. return null; } /* This method returns an array of all of the Movie objects that are * stored in the movieList. The array returned does not contain any NULL * values. This method returns an array of length 0 if the movieList is empty. * This method may call the getOnlyItems method */ public Movie[] getMovieListAsArray(){ // TODO: Implement this method. return null; } /* Returns the number of Movies stored in the movieList. */ public int getNumMovies(){ // TODO: Implement this method. return -500; } /* Returns true if the movieList contains no Movies, false otherwise. */ public boolean isEmpty(){ // TODO: Implement this method. return false; } /****** Private, "helper" method section ******/ /* Creates a new array that is double the size of the array passed in, copies the data * from that array to the new array, and returns the new array. * Note that the new array will contain the Movies from the previous array followed by NULL values. */ private Movie[] expandList(Movie[] inputList){ // TODO: Implement this method. return null; } /* A full Movie list is an array where all cells contain a Movie. That * means there is no cell that contains NULL. * This method returns true if all cells in the array contain a Movie * object, false otherwise. */ private boolean isFull(){ // TODO: Implement this method. return true; } /* * This method takes an array of Movies as an input as well as * the number of Movies on that array. The inputArray may contain * some NULL values. * This method returns an array that contains only the Movies in * the input array and no NULL values. * It returns an array of length 0 if there are no Movies in the input array. */ private Movie[] getOnlyItems(Movie[] inputArray, int size){ // TODO: Implement this method. return null; } }