1.IndexEntry.java:
//File: IndexEntry.java
//You don't need to change this class.
//The class for an index entry in the index tree for the Movie Database.
package assign6_template;
public class IndexEntry implements Comparable<IndexEntry> {
@Override
public int compareTo(IndexEntry other) {
return title.compareTo(other.title);
}
private String title;
private int location; //index in the list
public String getTitle() {
return title;
}
public int getLocation() {
return location;
}
public void setLocation(int location) {
this.location = location;
}
public IndexEntry(String title, int location) {
this.title = title;
this.location = location;
}
@Override
public String toString() {
return "IndexEntry{" + "title=" + title + ", location=" + location + '}';
}
2. Movie.java: //File: Movie.java //You don't need to revise this class. //The class for a movie in the Movie Database. package assign6_template; public class Movie { private String title; private String director; private int year; public Movie(String title, String director, int year) { this.title = title; this.director = director; this.year = year; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDirector() { return director; } public void setDirector(String director) { this.director = director; } public int getYear() { return year; } public void setYear(int year) { this.year = year; } @Override public String toString() { return "Title: " + title + ", Director: " + director + ", Year: " + year; } } 3. MovieDB.java: //File: MovieDB.java //You are to complete this class. package assign6_template; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Random; import java.util.Set; import java.util.TreeSet; public class //File: Movie.java //You don't need to revise this class. //The class for a movie in the Movie Database. package assign6_template; public class Movie { private String title; private String director; private int year; public Movie(String title, String director, int year) { this.title = title; this.director = director; this.year = year; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDirector() { return director; } public void setDirector(String director) { this.director = director; } public int getYear() { return year; } public void setYear(int year) { this.year = year; } @Override public String toString() { return "Title: " + title + ", Director: " + director + ", Year: " + year; } } { //----------Assign 6 Begin ----------------// //movie database, to be implemented as an array list (better) private List<Movie> movieDB; //initial capacity of the movie database (max number of movies stored) private static final int INITIAL_CAPACITY = 20; //the number of movies in the starter movie database private static final int STARTER_MOVIEDB_SIZE = 15; //decare a data field named titleIndex for the index for movie titles //must use both Set interface and TreeSet class in Java API //add your code here //constructor of MovieDB public MovieDB() { //Add your code //create the object for the empty movieDB //Create the object for the empty index tree. } //create a starter movie DB: // use randome numbers to generate STARTER_MOVIEDB_SIZE number of movies with randome data. // (e.g. Title15 Director15 2019) // use HashSet to test if a random number is unique. // append each random movie to the movieDB list. public void createStartMovieDB() { //add your own code //initialize the counter to 0. //Repeat // genereate a random number in the range: [0, STARTER_MOVIEDB_SIZE-1] // use a HashSet to check if the randome number is unique // if this random number is unique // use this random number to create a random movie with the random data: // like Title15 Director15 2019 // append the random movie to the movieDB list. // increase counter //Until STARTER_MOVIEDB_SIZE number of movies have been generated. //Hint: see sample usage of Random number generation in the main method below //Must use a HashSet to check if the random number is unique } //display the movies in the database in a nice tabular format // like the one in the sample output public void showMovieDB() { //add your own code //Hint: // use a loop to iterate over all movies in the movieDB // Use String.format(...) to print in the desired format // See set_map_use.IndexGenerator covered in Lec#19 for formatting. } //create the index tree for all titles (unique) in current movieDB public void createIndex() { //add your own code //Hint: // It's very similar to createIndex() in the class IndexGenerator in the package set_map_use_demo posted for Lec#19. // The difference is in handling the index entry in different stored format. //for each movie in the moiveDB list // create an index entry for this movie using IndexEntry class // (example index entry in displayed format: Title15 0) // add this IndexEntry object to the data field: titleIndex } //display the title index in in a tabular format // like the one in the sample output public void showIndex() { //add your own code //Hint: // It's similar to showIndex() in the class IndexGenerator in the package set_map_use_demo posted for Lec#19. // The difference is in handling the index entry in different stored format and different printed format. //for each index entry in the data field : titleIndex // display it using String.format(....) } //----------Assign 6 End ----------------// //code below might be helpful to you. public static void main(String[] args) { //create a random number generator Random randNumGenerator = new Random(); //get a random integer between 0 (inclusive) and 200 (exclusive) int randNumber = randNumGenerator.nextInt(200); System.out.println(randNumber); randNumber = randNumGenerator.nextInt(200); System.out.println(randNumber); } } 4. MovieDBConsole.java: //File: MovieDBConsole.java //You don't need to change this class. //The class for the console application of the Movie Database. package assign6_template; public class MovieDBConsole { public static void main(String[] args) { //create an empty movie database MovieDB myMovieDB = new MovieDB(); //populate the movie DB with random movie data myMovieDB.createStartMovieDB(); //display the starter movie DB information myMovieDB.showMovieDB(); //create the movie title index myMovieDB.createIndex(); //display the movie title index myMovieDB.showIndex(); } }
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