Netflix Database - PROGRAMMED IN JAVA PLEASE :) In this program, you will build a Netflix...
Netflix Database - PROGRAMMED IN JAVA PLEASE :)
In this program, you will build a Netflix movie database using the provided file, netflix.csv. The file contains more than two hundred records of movies and TV programs, with each record consisting a title, a rating, a release year, and a user rated score.
There are three classes that you will need to implement: Movie, NetflixHandler, and NetflixApp.
Class: Movie
|
Movie |
|
- title: String - rating: String - year: int - score: int |
|
+ Movie (String title, String rating, int year, int score) + getTitle(): String + getRating(): String + getYear(): int + getScore(): int + toString(): String |
Instance variables:
- title: Title of a movie or TV program.
- rating: Rating of a movie or TV program. E.x.: R or PG-13
- year: Year of release.
- score: User rated score.
Methods:
- Movie (String title, String rating, int year, int score): An overloaded constructor.
- Getters for all the instance variables.
- toString(): It returns a string of information: title year rating score
Class: NetflixHandler
|
NetflixHandler |
|
- data: Movie[] - actualSize: int + SIZE: int = 500 |
|
+ NetflixHandler () + read (String filePath): void + displayAllMovies (): void + searchTitle (): void + searchYear (): void + sort (Movie[] movies, int size): void + makeRecommendations(): void |
Instance variables and constants:
- data: It is an array of Movie objects.
- actualSize: It is the real number of Movie objects in a partially filled array.
- SIZE: A constant that is set to be 500.
Methods:
- NetflixHandler (): The default constructor that initializes the instance variable, data, to a Movie array that has a size of 500.
- read (): This method opens the given file, netflix.csv, and reads it. While reading the file line by line, it also creates a Movie object and saves it into data.
- displayAllMovies (): This method loops through all the Movie objects saved in data and display their information.
- searchTitle (): This method looks for a movie that matches the title provided by a user.
- searchYear (): This method looks for a group of movies that match the release year given by a user.
- sort (Movie[] movies, int size): This method sorts a given Movie array, movies, using the provided size. It sorts the array into a descending order based on the user rated score.
- makeRecommendations (): This method makes recommendations to a user based on two options. Option one: It finds the top-5 movies, based on the user rated score, under a certain rating. The method then writes those 5 movies into a file, “top_5_movies.txt”. Option two: It finds the top-20 movies, based on the score only. The method then writes those 20 movies in to a file, “top_20_movies.txt”.
Class: NetflixApp
This is the main class. It has a private and static method, menu, which displays a menu that contains several choices (Please see the expected outcomes file for more details.). The main method should create a NetflixHandler object and let it call the read method before taking any choices.
Submission
Zip your .java source files for all the classes together into a zip file.
Name the zip file with your initials and Program 7
Example format: KES-Program7.zip
__________________________________________________________________________
Output:
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 8
Please provide a valid input: 9
Please provide a valid input: 1
Title Year Rating Score
White Chicks 2004 PG-13 82
Grey's Anatomy 2016 TV-14 98
Prison Break 2008 TV-14 98
How I Met Your Mother 2014 TV-PG 94
Supernatural 2016 TV-14 95
Breaking Bad 2013 TV-MA 97
The Vampire Diaries 2017 TV-14 91
The Walking Dead 2015 TV-MA 98
Pretty Little Liars 2016 TV-14 96
Once Upon a Time 2016 TV-PG 98
Sherlock 2016 TV-14 95
Death Note 2006 TV-14 77
Naruto 2008 TV-PG 88
Arrow 2015 TV-14 96
. . . .
. . . .
. . . .
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 2
Please provide a title: jackass
The title does not match any of the movies.
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 2
Please provide a title: honey i shrunk the kids
Title Year Rating Score
Honey I Shrunk the Kids 1989 PG 80
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 3
Please provide a year: 2020
The year does not match any of the movies.
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 3
Please provide a year: 1997
Title Year Rating Score
Flubber 1997 PG 83
The Magic School Bus 1997 TV-Y 81
Anastasia 1997 G 93
Missione Hamburger 1997 PG 75
Animaniacs 1997 TV-Y7 72
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 4
Do you want the recommendations based on ratings or scores?
1. Ratings
2. Scores
Please choose 1 or 2: 5
Please provide a valid input: 6
Please provide a valid input: 1
Please provide a rating: n/a
The rating does not match any of the movies.
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 4
Do you want the recommendations based on ratings or scores?
1. Ratings
2. Scores
Please choose 1 or 2: 1
Please provide a rating: r
Recommendations made successfully! Top 5 movies found!
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 4
Do you want the recommendations based on ratings or scores?
1. Ratings
2. Scores
Please choose 1 or 2: 2
Recommendations made successfully! Top 20 movies found!
Welcome to the Netflix Database
==========================================
1. Browse all movies.
2. Search a movie based on title.
3. Search movies based on year.
4. Top movies recommendation.
5. Exit.
==========================================
Please make your choice: 5
Thank you for using the database. Please come back next time.
_______________________________________________
Netflix.csv:
Homework Answers
Here is the code for the above assignment
There are 3 files which contain the code.
Feel free to comment on any doubt and give thumbs up!
Code for Movie.java
class Movie {
// private data members
private String title;
private String rating;
private int year;
private int score;
// constructor
public Movie(String title, String rating, int year, int score) {
this.rating = rating;
this.score = score;
this.title = title;
this.year = year;
}
// getters
public String getTitle() {
return title;
}
public String getRating() {
return rating;
}
public int getYear() {
return year;
}
public int getScore() {
return score;
}
// to String method
public String toString() {
return title + " " + year + " " + rating + " " + score;
}
}
Code for NetflixHandler.java
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.Console;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;
class NetflixHandler {
private Movie[] data;
private int actualSize;
private final int SIZE = 500;
public NetflixHandler() {
data = new Movie[SIZE];
actualSize = 0;
}
public void read(String filePath) {
try {
BufferedReader br = new BufferedReader(new FileReader(filePath));
String line;
while ((line = br.readLine()) != null) {
String[] str = line.split(",");
String title = str[0];
int year = Integer.parseInt(str[1]);
String rating = str[2];
int score = Integer.parseInt(str[3]);
data[actualSize] = new Movie(title, rating, year, score);
actualSize += 1;
}
br.close();
} catch (Exception e) {
System.out.println("Error! File not found!");
return;
}
}
public void displayAllMovies() {
for (int i = 0; i < actualSize; ++i) {
System.out.println(data[i].toString());
}
}
public void searchTitle() {
Console con = System.console();
System.out.println("Please provide a title:");
String titlee = con.readLine();
boolean flag = false;
boolean firstEntry = false;
for (int i = 0; i < actualSize; ++i) {
if (data[i].getTitle().equalsIgnoreCase(titlee)) {
if (firstEntry == false) {
System.out.println("Title Year Rating Score");
firstEntry = true;
}
System.out.println(data[i].toString());
flag = true;
}
}
if (flag == false) {
System.out.println("The title does not match any of the movies.");
}
}
public void searchYear() {
Console con = System.console();
int year;
while (true) {
System.out.println("Please provide a year: ");
try {
year = Integer.parseInt(con.readLine());
break;
} catch (Exception e) {
System.out.println("Error! Enter a valid year");
}
}
boolean flag = false;
boolean firstEntry = false;
for (int i = 0; i < actualSize; ++i) {
if (data[i].getYear() == year) {
if (firstEntry == false) {
System.out.println("Title Year Rating Score");
firstEntry = true;
}
System.out.println(data[i].toString());
flag = true;
}
}
if (flag == false) {
System.out.println("The year does not match any of the movies.");
}
}
public void sort(Movie[] movies, int size) {
for (int i = 0; i < size; ++i) {
boolean flag = false;
for (int j = 0; j < size - 1; ++j) {
if (movies[j].getScore() > movies[j + 1].getScore()) {
Movie temp = movies[j];
movies[j] = movies[j + 1];
movies[j + 1] = temp;
flag = true;
}
}
if (flag == false) {
break;
}
}
}
public void makeRecommendations() {
System.out.println("Do you want the recommendations based on ratings or scores?\n1. Ratings\n2. Scores");
int option;
Console con = System.console();
while (true) {
try {
option = Integer.parseInt(con.readLine());
if (option == 1 || option == 2) {
break;
} else {
System.out.println("Please provide a valid input: ");
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error! Enter a valid number");
}
}
if (option == 1) {
System.out.println("Please provide a rating: ");
String rating = con.readLine();
boolean flag = false;
Movie[] tempArray = new Movie[SIZE];
int tempSize = 0;
for (int i = 0; i < actualSize; ++i) {
if (data[i].getRating().equalsIgnoreCase(rating)) {
tempArray[tempSize] = data[i];
tempSize++;
flag = true;
}
}
if (flag == false) {
System.out.println("The rating does not match any of the movies.");
return;
}
sort(tempArray, tempSize);
String outputFileName = "top_5_movies.txt";
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(new File(outputFileName)));
for (int i = tempSize - 1; i >= tempSize - 5; --i) {
bw.write(tempArray[i].toString() + "\n");
}
System.out.println("Recommendations made successfully! Top 5 movies found!");
bw.close();
} catch (Exception e) {
System.out.println("Error! Cannot able to create file!");
return;
}
} else {
String outputFileName = "top_20_movies.txt";
sort(data, actualSize);
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(new File(outputFileName)));
for (int i = actualSize - 1; i >= actualSize - 20; --i) {
bw.write(data[i].toString() + "\n");
}
System.out.println("Recommendations made successfully! Top 20 movies found!");
bw.close();
} catch (Exception e) {
System.out.println("Error while creating file");
}
}
}
}
Code for NetflixApp.java
import java.io.Console;
import java.util.Scanner;
public class NetflixApp {
public static void main(String[] args) {
Console con = System.console();
NetflixHandler handler = new NetflixHandler();
handler.read("movies.csv");
while (true) {
System.out.println(" Welcome to the Netflix Database");
System.out.println("==========================================");
System.out.println("1. Browse all movies.");
System.out.println("2. Search a movie based on title.");
System.out.println("3. Search movies based on year.");
System.out.println("4. Top movies recommendation");
System.out.println("5. Exit.");
System.out.println("==========================================");
System.out.print("Please make your choice: ");
int choice = 0;
try {
con.flush();
choice = Integer.parseInt(con.readLine());
if (choice < 1 || choice > 5) {
System.out.println("Error! Enter a valid choice!");
} else {
switch (choice) {
case 1:
handler.displayAllMovies();
break;
case 2:
handler.searchTitle();
break;
case 3:
handler.searchYear();
break;
case 4:
handler.makeRecommendations();
break;
case 5:
System.out.println("Thank you for using the database. Please come back next time.");
System.exit(1);
}
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error! Enter a valid number!");
}
}
}
}
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