Description
Movie Analysis
In this assignment, you will design a MovieAnalyzer class, which could read a movie dataset and perform
various useful analyses. You’ll have a chance to use techniques such as Collections, Lambda, and Streams,
which we’ve covered in the lectures.
The MovieAnalyzer class has one constructor that reads a dataset file from a given path. This class also has 6
other methods that perform data analyses. You’ll implement these methods in the MovieAnalyzer class.
Method details are described below.
0. Reading the dataset
public MovieAnalyzer(String dataset_path)
The constructor of MovieAnalyzer takes the path of the dataset file and reads the data. The dataset is in csv
format and has the following columns:
Series_Title – Name of the movie
Released_Year – Year at which that movie released
Certificate – Certificate earned by that movie
Runtime – Total runtime of the movie
Genre – Genre of the movie
IMDB_Rating – Rating of the movie at IMDB site
Overview – mini story/ summary
Meta_score – Score earned by the movie
Director – Name of the Director
Star1,Star2,Star3,Star4 – Name of the Stars
Noofvotes – Total number of votes
Gross – Money earned by that movie
Note: For each individual question, if the data cells required for this particular question are empty or
ill-formatted, you could simply ignore that entire row for this particular question.
CS209A Assignment 1 2 / 3
1. Movie count by year (10 points)
public Map<Integer, Integer> getMovieCountByYear()
This method returns a <year, count> map, where the key is the year while the value is the number of movies
released in that year.
The map should be sorted by descending order of year (i.e., from the latest to the earliest).
2. Movie count by genre (15 points)
public Map<String, Integer> getMovieCountByGenre()
This method returns a <genre, count> map, where the key is the genre while the value is the number of
movies in that genre.
The map should be sorted by descending order of count (i.e., from the most frequent genre to the least
frequent genre). If two genres have the same count, then they should be sorted by the alphabetical order of
the genre names.
3. Movie count by co-stars (15 points)
public Map<List, Integer> getCoStarCount()
If two people are the stars for the same movie, then the number of movies that they co-starred increases by 1.
This method returns a <[star1, star2], count> map, where the key is a list of names of the stars while the
value is the number of movies that they have co-starred in. Note that the length of the key is 2 and the names
of the stars should be sorted by alphabetical order in the list.
4. Top movies (20 points)
public List getTopMovies(int top_k, String by)
This method returns the top K movies (paramter top_k) by the given criterion (paramter by). Specifically,
by=”runtime”: the results should be movies sorted by descending order of runtime (from the
longest movies to the shortest movies) .
by=”overview”: the results should be movies sorted by descending order of the length of the
overview (from movies with the longest overview to movies with the shortest overview).
Note that the results should be a list of movie titles. If two movies have the same runtime or overview length,
then they should be sorted by alphabetical order of their titles.
CS209A Assignment 1 3 / 3
5. Top stars (20 points)
public List getTopStars(int top_k, String by)
This method returns the top K stars (paramter top_k) by the given criterion (paramter by). Specifically,
by=”rating”: the results should be stars sorted by descending order of the average rating of the
movies that s/he have starred in.
by=”gross”: the results should be stars sorted by descending order of the average gross of the
movies that s/he have starred in.
Note that the results should be a list of star names. If two stars have the same average rating or gross, then
they should be sorted by the alphabetical order of their names.
6. Search movies (20 points)
public List searchMovies(String genre, float min_rating, int max_runtime)
This method searches movies based on three criterion:
genre: genre of the movie
min_rating: the rating of the movie should >= min_rating
max_runtime: the runtime (min) of the movie should <= max_runtime
Note that the results should be a list of movie titles that meet the given criteria, and sorted by alphabetical
order of the titles.
Evaluation
Code Correctness: We deploy automatic test cases on the OJ system (https://oj.cse.sustech.edu.cn) to
test the correctness of your code. Please submit MovieAnalyzer.java to OJ. You could use our sample
test cases and sample test data to test your code locally before submitting to OJ.
Version Control: You should use GitHub to manage the code changes of your project (see lab 1 for
further details of how to use git). You should made at least 2 commits. Your remote repo on GitHub
should be set to private before A1 deadline, so that no one else will see your code.
Coding Style: You should pay attention to write readable and maintainable code along the way. See lab
1 for how to use CheckStyle for that purpose. After the deadline of A1, you can set your GitHub
repo to public, and we’ll check whether any of your commits have reduced CheckStyle warnings
according to google_checks.xml.
OJ Tips
Please specify StandardCharsets.UTF_8 when you read the .csv file.
Please don’t include any Chinese characters in your code comments.
CS209A Assignment 1
