HesamGhazi/HW-03-oop-and-api
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implementing HW-03-oop-and-api Ghazi

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HesamGhazi
2026-06-17 19:09:33 +03:30
parent 6a01e43eb2
commit 7399284cab
5 changed files with 117 additions and 40 deletions
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src/main/java/Rational/Rational.java
+19 -17
View File
@@ -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) ÷ (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
src/main/java/movie/apis/Main.java
+5 -2
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@@ -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;
src/main/java/movie/apis/Movie.java
+38 -3
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@@ -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<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
// 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<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; }
}
src/main/java/movie/apis/MovieService.java
+54 -18
View File
@@ -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<String> 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<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());
}
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());
}
}
}
}}