From e7f15e07bfc649562e7c302af27ff2443c0ccea0 Mon Sep 17 00:00:00 2001 From: Arshida_0 Date: Thu, 30 Apr 2026 16:35:02 +0430 Subject: [PATCH] Implement HW-03 --- src/main/java/Rational/Rational.java | 29 +++--- src/main/java/movie/apis/Main.java | 14 ++- src/main/java/movie/apis/Movie.java | 64 +++++++++++- src/main/java/movie/apis/MovieService.java | 108 +++++++++++++++++---- 4 files changed, 173 insertions(+), 42 deletions(-) diff --git a/src/main/java/Rational/Rational.java b/src/main/java/Rational/Rational.java index 7bd840e..59057f8 100644 --- a/src/main/java/Rational/Rational.java +++ b/src/main/java/Rational/Rational.java @@ -54,42 +54,43 @@ public class Rational { // TODO: Instance method - this - other // Formula: a/b - c/d = (a*d - c*b) / (b*d) public Rational subtract(Rational other) { - // YOUR CODE HERE - return null; // Remove this line when implemented + int newNumerator = this.numerator * other.denominator - other.numerator * this.denominator; + int newDenominator = this.denominator * other.denominator; + return new Rational(newNumerator, newDenominator); } // TODO: Static method - r1 - r2 public static Rational subtract(Rational r1, Rational r2) { - // YOUR CODE HERE - return null; // Remove this line when implemented + return r1.subtract(r2); } // TODO: Instance method - this * other // Formula: (a/b) * (c/d) = (a*c) / (b*d) public Rational multiply(Rational other) { - // YOUR CODE HERE - return null; // Remove this line when implemented + int newNumerator = this.numerator * other.numerator; + int newDenominator = this.denominator * other.denominator; + return new Rational(newNumerator, newDenominator); } // TODO: Static method - r1 * r2 public static Rational multiply(Rational r1, Rational r2) { - // YOUR CODE HERE - return null; // Remove this line when implemented + return r1.multiply(r2); } // TODO: Instance method - this / other // Formula: (a/b) รท (c/d) = (a*d) / (b*c) public Rational divide(Rational other) { - // YOUR CODE HERE - // HINT: Division is multiplication by reciprocal - // Don't forget to check if other.numerator is zero! - return null; // Remove this line when implemented + if (other.numerator == 0) { + throw new ArithmeticException("Divisor cannot be zero"); + } + int newNumerator = this.numerator * other.denominator; + int newDenominator = this.denominator * other.numerator; + return new Rational(newNumerator, newDenominator); } // TODO: Static method - r1 / r2 public static Rational divide(Rational r1, Rational r2) { - // YOUR CODE HERE - return null; // Remove this line when implemented + return r1.divide(r2); } // PROVIDED - String representation diff --git a/src/main/java/movie/apis/Main.java b/src/main/java/movie/apis/Main.java index f0e713d..3b62a81 100644 --- a/src/main/java/movie/apis/Main.java +++ b/src/main/java/movie/apis/Main.java @@ -21,15 +21,19 @@ public class Main { break; case 2: - // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre() - + // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre() . + System.out.println("Enter genre ID and page: "); + Long genre_id = scanner.nextLong(); + Long page = scanner.nextLong(); + movieService.displayMoviesByGenre(genre_id, page); break; case 3: - // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails() - - + // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails() . + System.out.println("Enter movie ID: "); + Long movie_id = scanner.nextLong(); + movieService.displayMovieDetails(movie_id); break; case 0: diff --git a/src/main/java/movie/apis/Movie.java b/src/main/java/movie/apis/Movie.java index c8cc4e2..0772613 100644 --- a/src/main/java/movie/apis/Movie.java +++ b/src/main/java/movie/apis/Movie.java @@ -10,15 +10,73 @@ public class Movie { private Long id; private String title; - private List genres; - private String images; + private List genres; + private List images; private String year; - private String imdbRating; + private String imdb_rating; private String country; // TODO: Create a constructor with all fields + public Movie(Long id, String title, List genres, + List images, String year, + String imdb_rating, String country) { + this.id = id; + this.title = title; + this.genres = genres; + this.images = images; + this.year = year; + this.imdb_rating = imdb_rating; + this.country = country; + } // TODO: Create a simple constructor with id and title only + public Movie(Long id, String title) { + this.id = id; + this.title = title; + } // TODO: Create getters and setters for all fields + public void setId(Long id) { + this.id = id; + } + public void setTitle(String title) { + this.title = title; + } + public void setGenres(List genres) { + this.genres = genres; + } + public void setImages(List images) { + this.images = images; + } + public void setYear(String year) { + this.year = year; + } + public void setImdb_rating(String imdb_rating) { + this.imdb_rating = imdb_rating; + } + public void setCountry(String country) { + this.country = country; + } + + public Long getId() { + return id; + } + public String getTitle() { + return title; + } + public List getGenres() { + return genres; + } + public List getImages() { + return images; + } + public String getYear() { + return year; + } + public String getImdb_rating() { + return imdb_rating; + } + public String getCountry() { + return country; + } } \ No newline at end of file diff --git a/src/main/java/movie/apis/MovieService.java b/src/main/java/movie/apis/MovieService.java index cbbe70b..5a6ed2f 100644 --- a/src/main/java/movie/apis/MovieService.java +++ b/src/main/java/movie/apis/MovieService.java @@ -4,6 +4,7 @@ import com.google.gson.*; import com.google.gson.reflect.TypeToken; import java.io.IOException; +import java.lang.reflect.Array; import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; @@ -88,7 +89,7 @@ public class MovieService { } /** - * TODO 1: Display movies for a specific genre and page + * TODO 1: Display movies for a specific genre and page . * * JSON format: { "movies": [ { "id": 1, "title": "Movie", "year": "1994" } ], "total": 177, "total_pages": 18 } * @@ -101,12 +102,58 @@ public class MovieService { * * PUT ALL PARSING CODE INSIDE try-catch */ - public void displayMoviesByGenre(Long genreId, Long page) { - // TODO: Write your code here - // All parsing code must be inside try-catch - try { - // Your code here + public List listMaker(String str_obj) { + List movies_lst = new ArrayList(); + try { + JsonObject json_obj = JsonParser.parseString(str_obj).getAsJsonObject(); + JsonArray movies_data = json_obj.getAsJsonArray("movies"); + + for (int i = 0; i < movies_data.size(); i++){ + JsonObject movie = movies_data.get(i).getAsJsonObject(); + Long id = movie.get("id").getAsLong(); + String title = movie.get("title").toString(); + String year = movie.get("year").toString(); + + Movie Movie_movie = new Movie(id, title); + Movie_movie.setYear(year); + + movies_lst.add(Movie_movie); + } + return movies_lst; + + } catch (Exception e) { + System.err.println("ERROR: " + e.getMessage()); + } + return null; + } + + public void printMoviesList(List lst) { + if (lst != null) { + for (int i = 0; i < lst.size(); i++) { + Movie a_movie = lst.get(i); + System.out.println("ID: " + a_movie.getId() + " | " + + a_movie.getTitle() + " (" + a_movie.getYear() + ")"); + } + } + } + + public void displayMoviesByGenre(Long genreId, Long page) { + // TODO: Write your code here . + // All parsing code must be inside try-catch + String str_obj = getMoviesByGenreList(genreId, page); + if (str_obj == null) { + System.out.println("Failed to get movies by genre"); + return; + } + List movie_list = listMaker(str_obj); + printMoviesList(movie_list); + + try { + JsonObject json_obj = JsonParser.parseString(str_obj).getAsJsonObject(); + String total = json_obj.get("total").toString(); + String total_pages = json_obj.get("total_pages").toString(); + System.out.println("total: " + total + " total pages: " + total_pages); } catch (Exception e) { System.err.println("ERROR: " + e.getMessage()); } @@ -114,18 +161,17 @@ public class MovieService { /** - * BONUS: Fetch movie details from API using movie ID + * BONUS: Fetch movie details from API using movie ID . * URL format: https://api.meshcomp.ir/api/v1/movies/{movieId} */ private String getMovieById(Long movieId) { try { - // TODO: Complete this method - // String url = MOVIE_BY_ID_URL + movieId; - // HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build(); - // HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString()); - // if (response.statusCode() == 200) return response.body(); + // TODO: Complete this method . + String url = MOVIE_BY_ID_URL + movieId; + HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build(); + HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString()); + if (response.statusCode() == 200) return response.body(); - return null; } catch (Exception e) { System.out.println("!!Exception : " + e.getMessage()); } @@ -133,7 +179,7 @@ public class MovieService { } /** - * BONUS TODO: Display complete movie details for a given movie ID + * BONUS TODO: Display complete movie details for a given movie ID . * * Expected JSON format from getMovieById(): * { @@ -167,22 +213,44 @@ public class MovieService { System.out.println("Failed to get movie details for ID: " + movieId); return; } - // Step 3-6: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch) try { - // TODO: Parse jsonResponse to JsonObject - // TODO: Extract id, title, year, genres array, poster, country, imdb_rating - // TODO: Convert genres array to a readable string - // TODO: Print all movie details + // TODO: Parse jsonResponse to JsonObject . + JsonObject json_obj = JsonParser.parseString(jsonResponse).getAsJsonObject(); + + // TODO: Extract id, title, year, genres array, poster, country, imdb_rating . + String id = json_obj.get("id").toString(); + String title = json_obj.get("title").toString(); + String year = json_obj.get("year").toString(); + String poster = json_obj.get("poster").toString(); + String country = json_obj.get("country").toString(); + String imdb_rating = json_obj.get("imdb_rating").toString(); + JsonArray genres = json_obj.getAsJsonArray("genres"); + + // TODO: Convert genres array to a readable string . + String genres_str = ""; + for (int i = 0; i < genres.size(); i++) { + String a_genre = genres.get(i).toString(); + genres_str += a_genre; + if (i != genres.size() - 1) genres_str += ", "; + } + + // TODO: Print all movie details . + String info = ("ID: " + id + "title: " + title + + "year: " + year + "poster: " + poster + + "ccountry: " + country + "imdb rating: " + imdb_rating + + "genres: " + genres_str); + System.out.println(info); + // HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject() // HINT: Use getAsJsonArray("genres") to get genres // HINT: For each genre, use getAsString() // Your code here: - } catch (Exception e) { System.err.println("ERROR parsing movie details: " + e.getMessage()); } } + // } \ No newline at end of file -- 2.54.0