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## Third Assignment: Movie Explorer 🎬 + Rational Calculator 🧮
---
Welcome to Your Third Assignment in the Advanced Programming Course!
This assignment consists of two separate parts. You must complete both parts.
---
## Part 1: Rational Class (Rational Numbers)
In this part, you will implement a Rational class that supports basic mathematical operations.
Tasks:
Define fields for numerator and denominator
Implement addition, subtraction, multiplication, and division as instance methods
Implement addition, subtraction, multiplication, and division as static methods
Note: Detailed TODO comments are provided inside Rational.java.
---
## Part 2: Movie Explorer 🎬 (Using API)
In this part, you will develop a Java application that fetches movie data from an API and allows users to browse and search movies.
Files Provided:
Movie.java
Genre.java
MovieService.java
Main.java
Tasks:
Complete the Movie class (fields, constructor, getters/setters)
Complete the Genre class (fields, constructor, getters/setters)
Parse JSON data from getGenresList() into a list of Genre objects
Display the list of genres to the user
Fetch and return a list of movies by genreId and page number
Display the genres of a specific movie
Implement a console menu in Main to receive user input and display data
Note: Detailed TODO comments are provided inside each of the above source files.
---
## Objectives ✏️
By completing this assignment, you will:
Reinforce OOP concepts: class design, constructors, encapsulation, collections
Practice instance methods vs. static methods
Work with JSON parsing and REST APIs
Design a simple console-based menu
Improve Git workflow and project management
----
## Prerequisites ✅
Git
Java (version 23 or 25)
Maven as a package manager
---
## Tasks Summary 📝
Fork the repository and clone it locally
Create and switch to a development branch
Complete Part 1 (Rational.java) following the TODO comments
Complete Part 2 (Movie.java, Genre.java, MovieService.java, Main.java) following the TODO comments
Ensure the code compiles and runs correctly
Commit and push regularly
Submit a pull request from development to main
---
## Evaluation Criteria ⚖️
Functionality: Code compiles and runs without errors; all features work correctly
Code Quality: Clean, readable, well-structured code with proper naming
Understanding: You must be able to explain your implementation
---
## Bonus Tasks ✒️
Parse the JSON returned by the `getMovieInfo` method into a MovieInfo entity, and then present the structured movie details based on the userprovided movie ID.
Advanced search (title, genre, year, rating, etc.)
Sorting options for movies
Save/load favorite movies to/from a file
Improved console menu design
GUI version using JavaFX
---
## Submission ⌛
Deadline: May 1st (11 Ordibehesht)
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@@ -11,7 +11,7 @@ public class MovieService {
private final static String GENRES_URL = "https://moviesapi.ir/api/v1/genres";
private static String MOVIES_BY_GENRE_URL = "https://moviesapi.ir/api/v1/genres/";
private final static String MOVIE_INFO = "https://moviesapi.ir/api/v1/movies/{movie_id}";//todo fazel
private final static String MOVIE_INFO = "https://moviesapi.ir/api/v1/movies/{movie_id}";
private final static HttpClient client = HttpClient.newHttpClient();
private ArrayList<Movie> moviesList;
private ArrayList<Genre> genresList;
@@ -61,6 +61,31 @@ public class MovieService {
return null;
}
private String getMovieInfo(Long movieId) {
try {
String url = MOVIE_INFO.replace("{movie_id}", movieId.toString());
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(url))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() == 200) {
System.out.println("Movie Info received successfully");
return response.body();
} else {
throw new IOException("HTTP error code: " + response.statusCode());
}
} catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage());
}
return null;
}
// TODO: Write a method that parses the JSON returned by getGenresList() into a list of Genre objects.
// TODO: Write a method that displays the list of genres.