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Implement HW-03 #1

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reyhne merged 1 commits from develop into main 2026-06-26 14:08:26 +00:00
Conversation 1 Commits 1 Files Changed 4
+173 -42
4 changed files with 173 additions and 42 deletions
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src/main/java/Rational/Rational.java
+15 -14
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@@ -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) ÷ (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
src/main/java/movie/apis/Main.java
+9 -5
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@@ -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:
src/main/java/movie/apis/Movie.java
+61 -3
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@@ -10,15 +10,73 @@ public class Movie {
private Long id;
private String title;
private List<Genre> genres;
private String images;
private List<String> genres;
private List<String> 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<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 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<String> genres) {
this.genres = genres;
}
public void setImages(List<String> 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<String> getGenres() {
return genres;
}
public List<String> getImages() {
return images;
}
public String getYear() {
return year;
}
public String getImdb_rating() {
return imdb_rating;
}
public String getCountry() {
return country;
}
}
src/main/java/movie/apis/MovieService.java
+88 -20
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@@ -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<Movie> listMaker(String str_obj) {
List<Movie> movies_lst = new ArrayList<Movie>();
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<Movie> 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> 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<String> 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<String> 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());
}
}
//
}