From 7399284cabe17514af5df36a35f8aeb963b1c3c2 Mon Sep 17 00:00:00 2001 From: Hesam Ghazi Date: Wed, 17 Jun 2026 19:09:33 +0330 Subject: [PATCH] implementing HW-03-oop-and-api Ghazi --- .idea/.name | 1 + src/main/java/Rational/Rational.java | 36 ++++++----- src/main/java/movie/apis/Main.java | 7 ++- src/main/java/movie/apis/Movie.java | 41 +++++++++++- src/main/java/movie/apis/MovieService.java | 72 ++++++++++++++++------ 5 files changed, 117 insertions(+), 40 deletions(-) create mode 100644 .idea/.name diff --git a/.idea/.name b/.idea/.name new file mode 100644 index 0000000..002da1d --- /dev/null +++ b/.idea/.name @@ -0,0 +1 @@ +Main.java \ No newline at end of file diff --git a/src/main/java/Rational/Rational.java b/src/main/java/Rational/Rational.java index 7bd840e..2a4c81a 100644 --- a/src/main/java/Rational/Rational.java +++ b/src/main/java/Rational/Rational.java @@ -51,45 +51,47 @@ public class Rational { return r1.add(r2); } - // 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("Cannot divide by 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..7103956 100644 --- a/src/main/java/movie/apis/Main.java +++ b/src/main/java/movie/apis/Main.java @@ -21,13 +21,16 @@ public class Main { break; case 2: - // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre() + Long genreId = getLongInput("Enter genre ID: "); + Long page = getLongInput("Enter page number: "); + movieService.displayMoviesByGenre(genreId, page); break; case 3: - // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails() + Long movieId = getLongInput("Enter movie ID: "); + movieService.displayMovieDetails(movieId); break; diff --git a/src/main/java/movie/apis/Movie.java b/src/main/java/movie/apis/Movie.java index 969774a..e7c27a5 100644 --- a/src/main/java/movie/apis/Movie.java +++ b/src/main/java/movie/apis/Movie.java @@ -16,9 +16,44 @@ public class Movie { private String imdb_rating; private String country; - // TODO: Create a constructor with all fields + // Constructor (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 + // Constructor (id + title only) + public Movie(Long id, String title) { + this.id = id; + this.title = title; + } + public Movie() {} - // TODO: Create getters and setters for all fields + // Getters & Setters + public Long getId() { return id; } + public void setId(Long id) { this.id = id; } + + public String getTitle() { return title; } + public void setTitle(String title) { this.title = title; } + + public List getGenres() { return genres; } + public void setGenres(List genres) { this.genres = genres; } + + public List getImages() { return images; } + public void setImages(List images) { this.images = images; } + + public String getYear() { return year; } + public void setYear(String year) { this.year = year; } + + public String getImdb_rating() { return imdb_rating; } + public void setImdb_rating(String imdb_rating) { this.imdb_rating = imdb_rating; } + + public String getCountry() { return country; } + public void setCountry(String country) { this.country = 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 3f053f5..b7db72e 100644 --- a/src/main/java/movie/apis/MovieService.java +++ b/src/main/java/movie/apis/MovieService.java @@ -103,10 +103,33 @@ 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 + String jsonResponse = getMoviesByGenreList(genreId, page); + + if (jsonResponse == null) { + System.out.println("No data received!"); + return; + } + + JsonObject root = JsonParser.parseString(jsonResponse).getAsJsonObject(); + + JsonArray moviesArray = root.getAsJsonArray("movies"); + + int total = root.get("total").getAsInt(); + int totalPages = root.get("total_pages").getAsInt(); + + System.out.println("\nTOTAL MOVIES: " + total); + System.out.println("TOTAL PAGES: " + totalPages + "\n"); + + for (JsonElement element : moviesArray) { + JsonObject obj = element.getAsJsonObject(); + + Long id = obj.get("id").getAsLong(); + String title = obj.get("title").getAsString(); + String year = obj.get("year").getAsString(); + + System.out.println("ID: " + id + " | " + title + " (" + year + ")"); + } } catch (Exception e) { System.err.println("ERROR: " + e.getMessage()); @@ -120,16 +143,23 @@ public class MovieService { */ 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(); + 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()); } + return null; } @@ -171,22 +201,28 @@ public class MovieService { */ public void displayMovieDetails(Long movieId) { - // Step 1: Get JSON response from API String jsonResponse = getMovieById(movieId); - // Step 2: Check if we got valid data - // Step 3-5: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch) if (jsonResponse == null) { System.out.println("Failed to get movie details for ID: " + movieId); return; } + try { - // TODO: Parse jsonResponse to JsonObject - // HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject() - // TODO: use Gson to parse the json - // Your code here: + JsonObject obj = JsonParser.parseString(jsonResponse).getAsJsonObject(); + + Gson gson = new Gson(); + Movie movie = gson.fromJson(obj, Movie.class); + + System.out.println("\n======================================================================="); + System.out.println(movie.getTitle() + " (" + movie.getYear() + ")"); + System.out.println("======================================================================="); + System.out.println("Rating: " + movie.getImdb_rating()); + System.out.println("Country: " + movie.getCountry()); + System.out.println("Genres: " + movie.getGenres()); + System.out.println("=======================================================================\n"); + } catch (Exception e) { System.err.println("ERROR parsing movie details: " + e.getMessage()); } - } -} \ No newline at end of file + }} \ No newline at end of file