Movie Explorer + Rational Calculator

src/main/java/Rational/Rational.java

@@ -1,12 +1,15 @@
 package Rational;
 
-public class Rational {
+public class Rational
+{
     private int numerator;
     private int denominator;
 
     // Constructor
-    public Rational(int numerator, int denominator) {
+    public Rational(int numerator, int denominator)
-        if (denominator == 0) {
+    {
+        if (denominator == 0)
+        {
             throw new IllegalArgumentException("Denominator cannot be zero");
         }
         this.numerator = numerator;
@@ -15,10 +18,12 @@ public class Rational {
     }
 
     // GCD helper for simplification
-    private int gcd(int a, int b) {
+    private int gcd(int a, int b)
+    {
         a = Math.abs(a);
         b = Math.abs(b);
-        while (b != 0) {
+        while (b != 0)
+        {
             int temp = b;
             b = a % b;
             a = temp;
@@ -27,82 +32,95 @@ public class Rational {
     }
 
     // Simplify the fraction
-    private void simplify() {
+    private void simplify()
+    {
         int gcd = gcd(numerator, denominator);
         numerator /= gcd;
         denominator /= gcd;
 
         // Keep denominator positive
-        if (denominator < 0) {
+        if (denominator < 0)
+        {
             numerator = -numerator;
             denominator = -denominator;
         }
     }
 
-    //  COMPLETED - Instance method: this + other
+    // Instance method: this + other
-    public Rational add(Rational other) {
+    public Rational add(Rational other)
+    {
         int newNumerator = this.numerator * other.denominator + other.numerator * this.denominator;
         int newDenominator = this.denominator * other.denominator;
         return new Rational(newNumerator, newDenominator);
     }
 
-    //  COMPLETED - Static method: r1 + r2
+    // Static method: r1 + r2
-    public static Rational add(Rational r1, Rational r2) {
+    public static Rational add(Rational r1, Rational r2)
+    {
         return r1.add(r2);
     }
 
-    // TODO: Instance method - this - other
+    // Instance method - this - other
-    // Formula: a/b - c/d = (a*d - c*b) / (b*d)
+    public Rational subtract(Rational other)
-    public Rational subtract(Rational other) {
+    {
-        // YOUR CODE HERE
+        int newNumerator = this.numerator * other.denominator - other.numerator * this.denominator;
-        return null; // Remove this line when implemented
+        int newDenominator = this.denominator * other.denominator;
+        return new Rational(newNumerator, newDenominator);
     }
 
-    // TODO: Static method - r1 - r2
+    // Static method - r1 - r2
-    public static Rational subtract(Rational r1, Rational 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
+    // Instance method - this * other
-    // Formula: (a/b) * (c/d) = (a*c) / (b*d)
+    public Rational multiply(Rational other)
-    public Rational multiply(Rational other) {
+    {
-        // YOUR CODE HERE
+        int newNumerator = this.numerator * other.numerator;
-        return null; // Remove this line when implemented
+        int newDenominator = this.denominator * other.denominator;
+        return new Rational(newNumerator, newDenominator);
     }
 
-    // TODO: Static method - r1 * r2
+    // Static method - r1 * r2
-    public static Rational multiply(Rational r1, Rational 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
+    // Instance method - this / other
     // Formula: (a/b) ÷ (c/d) = (a*d) / (b*c)
-    public Rational divide(Rational other) {
+    public Rational divide(Rational other)
-        // YOUR CODE HERE
+    {
-        // HINT: Division is multiplication by reciprocal
+        if (other.numerator == 0)
-        // Don't forget to check if other.numerator is zero!
+        {
-        return null; // Remove this line when implemented
+            throw new ArithmeticException("Division by zero rational number.");
+        }
+        int newNumerator = this.numerator * other.denominator;
+        int newDenominator = this.denominator * other.numerator;
+        return new Rational(newNumerator, newDenominator);
     }
 
-    // TODO: Static method - r1 / r2
+    // Static method - r1 / r2
-    public static Rational divide(Rational r1, Rational 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
+    // String representation
     @Override
-    public String toString() {
+    public String toString()
-        if (denominator == 1) {
+    {
+        if (denominator == 1)
+        {
             return numerator + "";
         }
         return numerator + "/" + denominator;
     }
 
-    //  PROVIDED - Decimal value
+    // Decimal value
-    public double toDouble() {
+    public double toDouble()
+    {
         return (double) numerator / denominator;
     }
-}
+}

src/main/java/movie/apis/Main.java

@@ -15,37 +15,36 @@ public class Main {
             displayMenu();
             int choice = getIntInput("Enter your choice: ");
 
-            switch (choice) {
+            switch (choice)
+            {
                 case 1:
                     movieService.displayGenres();
                     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;
 
                 case 0:
                     running = false;
                     System.out.println("Goodbye!");
-
                     break;
 
                 default:
-                    System.out.println("Invalid choice! Please enter 0-4");
+                    System.out.println("Invalid choice! Please enter 0–3");
             }
 
-            if (running) {
+            if (running)
+            {
                 System.out.println("\nPress Enter to continue...");
                 scanner.nextLine();
-                scanner.nextLine();
             }
         }
 
@@ -70,7 +69,7 @@ public class Main {
             scanner.next();
         }
         int input = scanner.nextInt();
-        scanner.nextLine();
+        scanner.nextLine(); // consume newline
         return input;
     }
 
@@ -81,7 +80,7 @@ public class Main {
             scanner.next();
         }
         Long input = scanner.nextLong();
-        scanner.nextLine();
+        scanner.nextLine(); // consume newline
         return input;
     }
 }

src/main/java/movie/apis/Movie.java

@@ -2,12 +2,8 @@ package movie.apis;
 
 import java.util.List;
 
-/**
+public class Movie
- * Model class representing a movie
+{
- * Fields: id, title, genres, images
- */
-public class Movie {
-
     private Long id;
     private String title;
     private List<String> genres;
@@ -16,9 +12,175 @@ public class Movie {
     private String imdb_rating;
     private String country;
 
-    // TODO: Create a constructor with all fields
+    private String imdb_votes;
+    private String director;
+    private String actors;
+    private String runtime;
+    private String rated;
+    private String released;
+    private String plot;
+    private String awards;
 
-    // TODO: Create a simple constructor with id and title only
+    // Constructor with all fields
+    public Movie(Long id, String title, List<String> genres, List<String> 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 getters and setters for all fields
+    // Simple constructor with id and title only
+    public Movie(Long id, String title)
+    {
+        this.id = id;
+        this.title = title;
+        this.genres = null;
+        this.images = null;
+        this.year = null;
+        this.imdb_rating = null;
+        this.country = null;
+    }
+
+    // Getters and setters for all fields
+    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<String> getGenres()
+    {
+        return genres;
+    }
+
+    public void setGenres(List<String> genres)
+    {
+        this.genres = genres;
+    }
+
+    public List<String> getImages()
+    {
+        return images;
+    }
+
+    public void setImages(List<String> 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;
+    }
+
+    public String getImdb_votes()
+    {
+        return imdb_votes;
+    }
+
+    public void setImdb_votes(String imdb_votes)
+    {
+        this.imdb_votes = imdb_votes;
+    }
+
+    public String getDirector()
+    {
+        return director;
+    }
+
+    public void setDirector(String director)
+    {
+        this.director = director;
+    }
+
+    public String getActors() {return actors;}
+
+    public void setActors(String actors) {this.actors = actors;}
+
+    public String getRuntime()
+    {
+        return runtime;
+    }
+
+    public void setRuntime(String runtime) {this.runtime = runtime;}
+
+    public String getRated()
+    {
+        return rated;
+    }
+
+    public void setRated(String rated)
+    {
+        this.rated = rated;
+    }
+
+    public String getReleased()
+    {
+        return released;
+    }
+
+    public void setReleased(String released) {this.released = released;}
+
+    public String getPlot()
+    {
+        return plot;
+    }
+
+    public void setPlot(String plot)
+    {
+        this.plot = plot;
+    }
+
+    public String getAwards()
+    {
+        return awards;
+    }
+
+    public void setAwards(String awards)
+    {
+        this.awards = awards;
+    }
 }

src/main/java/movie/apis/MovieService.java

@@ -12,7 +12,8 @@ import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.List;
 
-public class MovieService {
+public class MovieService
+{
 
     private final static String GENRES_URL = "https://api.meshcomp.ir/api/v1/genres";
     private final static String MOVIE_BY_ID_URL = "https://api.meshcomp.ir/api/v1/movies/";
@@ -60,8 +61,6 @@ public class MovieService {
         return null;
     }
 
-
-
     public void displayGenres() {
         String jsonResponse = getGenresList();
 
@@ -87,105 +86,108 @@ public class MovieService {
         }
     }
 
-    /**
-     * TODO 1: Display movies for a specific genre and page
-     *
-     * Open this link in your browser (and check Pretty-print checkbox) to view json format:
-     * https://api.meshcomp.ir/api/v1/genres/1/movies
-     *
-     * Steps:
-     * - Call getMoviesByGenreList(genreId, page) to get JSON
-     * - Parse JSON to JsonObject
-     * - Get "movies" array (NOT "data")
-     * - Loop through array and print: "ID: {id} | {title} ({year})"
-     * - Also print total and total_pages
-     *
-     * 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
 
-        } catch (Exception e) {
+    public void displayMoviesByGenre(Long genreId, Long page)
+    {
+        try
+        {
+            String jsonResponse = getMoviesByGenreList(genreId, page);
+
+            if (jsonResponse == null)
+            {
+                System.out.println("Failed to get movies for genre ID: " + genreId + ", page: " + page);
+                return;
+            }
+
+            JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
+
+            JsonArray moviesArray = rootObject.getAsJsonArray("movies");
+            int total = rootObject.get("total").getAsInt();
+            int totalPages = rootObject.get("total_pages").getAsInt();
+
+            System.out.println("\nMOVIES (Genre ID: " + genreId + ", Page: " + page + ")");
+            for (JsonElement element : moviesArray)
+            {
+                JsonObject movieObject = element.getAsJsonObject();
+                Long id = movieObject.get("id").getAsLong();
+                String title = movieObject.get("title").getAsString();
+                String year = movieObject.get("year").getAsString();
+                System.out.println("ID: " + id + " | " + title + " (" + year + ")");
+            }
+
+            System.out.println("Total: " + total + " | Total Pages: " + totalPages);
+            System.out.println();
+
+        }
+        catch (Exception e)
+        {
             System.err.println("ERROR: " + e.getMessage());
         }
     }
 
+    private String getMovieById(Long movieId)
+    {
+        try
+        {
+            String url = MOVIE_BY_ID_URL + movieId;
 
-    /**
+            HttpRequest request = HttpRequest.newBuilder()
-     * BONUS: Fetch movie details from API using movie ID
+                    .uri(URI.create(url))
-     * URL format: https://api.meshcomp.ir/api/v1/movies/{movieId}
+                    .build();
-     */
-    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<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-            // if (response.statusCode() == 200) return response.body();
 
-            return null;
+            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-        } catch (Exception e) {
+
+            if (response.statusCode() == 200)
+            {
+                return response.body();
+            }
+            else
+            {
+                System.out.println("HTTP error code: " + response.statusCode());
+                return null;
+            }
+        }
+        catch (Exception e)
+        {
             System.out.println("!!Exception : " + e.getMessage());
         }
         return null;
     }
 
-     /*
+    public void displayMovieDetails(Long movieId)
-     BONUS TODO: Display complete movie details for a given movie ID
+    {
-
-     Open this link in your browser (and check Pretty-print checkbox) to view json format:
-     https://api.meshcomp.ir/api/v1/movies/1
-
-     INSTRUCTIONS:
-     1. Call getMovieById(movieId) to get the JSON response string
-     2. Check if response is null (if yes, print error and return)
-     3. Parse the JSON string to JsonObject (inside try-catch)
-     4. Use Gson to extract all fields from the JSON and map them to your Movie class:
-        - Add missing JSON fields to your Movie class first (actors, awards, director,
-          imdb_id, imdb_votes, metascore, plot, rated, released, runtime, type, writer)
-        - Then use Gson to parse your json string
-     5. Print all movie details in a readable format
-
-     (PUT ALL PARSING CODE INSIDE THE EXISTING try-catch)
-     */
-
-    /* EXAMPLE OUTPUT:
-
-           =======================================================================
-                               THE SHAWSHANK REDEMPTION (1994)
-           =======================================================================
-           Rating: 9.3/10  |  Votes: 1,738,596
-           Director: Frank Darabont
-           Cast: Tim Robbins, Morgan Freeman, Bob Gunton, William Sadler
-           Genre: Crime, Drama
-           Runtime: 142 min  |  Rated: R
-           Country: USA  |  Released: 14 Oct 1994
-           Plot: Two imprisoned men bond over a number of years, finding
-           solace and eventual redemption through acts of common decency.
-           Awards: Nominated for 7 Oscars. Another 19 wins & 30 nominations.
-           =======================================================================
-
-     */
-
-    public void displayMovieDetails(Long movieId) {
-        // Step 1: Get JSON response from API
         String jsonResponse = getMovieById(movieId);
 
-        // Step 2: Check if we got valid data
+        if (jsonResponse == null)
-        // 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
+        try
-            // HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
+        {
-            // TODO: use Gson to parse the json
+            JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
-            // Your code here:
+
-        } catch (Exception e) {
+            Gson gson = new Gson();
+            Movie movie = gson.fromJson(rootObject, Movie.class);
+
+            System.out.println("======================================================================");
+            System.out.println("                               " + movie.getTitle() + " (" + movie.getYear() + ")");
+            System.out.println("======================================================================");
+            System.out.println("Rating: " + movie.getImdb_rating() + "/10  |  Votes: " + movie.getImdb_votes());
+            System.out.println("Director: " + movie.getDirector());
+            System.out.println("Cast: " + movie.getActors());
+            String genresText = (movie.getGenres() != null) ? String.join(", ", movie.getGenres()) : "";
+            System.out.println("Genre: " + genresText);
+            System.out.println("Runtime: " + movie.getRuntime() + "  |  Rated: " + movie.getRated());
+            System.out.println("Country: " + movie.getCountry() + "  |  Released: " + movie.getReleased());
+            System.out.println("Plot: " + movie.getPlot());
+            System.out.println("Awards: " + movie.getAwards());
+            System.out.println("======================================================================");
+
+        }
+        catch (Exception e)
+        {
             System.err.println("ERROR parsing movie details: " + e.getMessage());
         }
     }