2 Commits
Author SHA1 Message Date
Reza 38b99a05af complete 2026-04-30 11:41:32 +03:30
Reza 872c3cd166 complete 2026-04-30 11:31:14 +03:30
4 changed files with 192 additions and 177 deletions
+26 -31
View File
@@ -4,7 +4,7 @@ public class Rational {
private int numerator; private int numerator;
private int denominator; 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"); throw new IllegalArgumentException("Denominator cannot be zero");
@@ -14,7 +14,7 @@ public class Rational {
simplify(); simplify();
} }
// GCD helper for simplification
private int gcd(int a, int b) { private int gcd(int a, int b) {
a = Math.abs(a); a = Math.abs(a);
b = Math.abs(b); b = Math.abs(b);
@@ -26,73 +26,69 @@ public class Rational {
return a; return a;
} }
// Simplify the fraction
private void simplify() { private void simplify() {
int gcd = gcd(numerator, denominator); int gcd = gcd(numerator, denominator);
numerator /= gcd; numerator /= gcd;
denominator /= gcd; denominator /= gcd;
// Keep denominator positive
if (denominator < 0) { if (denominator < 0) {
numerator = -numerator; numerator = -numerator;
denominator = -denominator; denominator = -denominator;
} }
} }
// COMPLETED - 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 newNumerator = this.numerator * other.denominator + other.numerator * this.denominator;
int newDenominator = this.denominator * other.denominator; int newDenominator = this.denominator * other.denominator;
return new Rational(newNumerator, newDenominator); return new Rational(newNumerator, newDenominator);
} }
// COMPLETED - Static method: r1 + r2
public static Rational add(Rational r1, Rational r2) { public static Rational add(Rational r1, Rational r2) {
return r1.add(r2); 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) { 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
public static Rational subtract(Rational r1, Rational r2) { public static Rational subtract(Rational r1, Rational r2) {
// YOUR CODE HERE return r1.subtract(r2);
return null; // Remove this line when implemented
} }
// TODO: 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
public static Rational multiply(Rational r1, Rational r2) { public static Rational multiply(Rational r1, Rational r2) {
// YOUR CODE HERE return r1.multiply(r2);
return null; // Remove this line when implemented
} }
// TODO: 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 if (other.numerator == 0 ) {
// HINT: Division is multiplication by reciprocal throw new ArithmeticException("Cannot divide by zero");
// Don't forget to check if other.numerator is zero! }
return null; // Remove this line when implemented 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) { public static Rational divide(Rational r1, Rational r2) {
// YOUR CODE HERE return r1.divide(r2);
return null; // Remove this line when implemented
} }
// PROVIDED - String representation
@Override @Override
public String toString() { public String toString() {
if (denominator == 1) { if (denominator == 1) {
@@ -101,7 +97,6 @@ public class Rational {
return numerator + "/" + denominator; return numerator + "/" + denominator;
} }
// PROVIDED - Decimal value
public double toDouble() { public double toDouble() {
return (double) numerator / denominator; return (double) numerator / denominator;
} }
+7 -22
View File
@@ -3,55 +3,42 @@ package movie.apis;
import java.util.Scanner; import java.util.Scanner;
public class Main { public class Main {
private static final MovieService movieService = new MovieService(); private static final MovieService movieService = new MovieService();
private static final Scanner scanner = new Scanner(System.in); private static final Scanner scanner = new Scanner(System.in);
public static void main(String[] args) { public static void main(String[] args) {
System.out.println("\n=== MOVIE API CLIENT ===\n"); System.out.println("\n=== MOVIE API CLIENT ===\n");
boolean running = true; boolean running = true;
while (running) { while (running) {
displayMenu(); displayMenu();
int choice = getIntInput("Enter your choice: "); int choice = getIntInput("Enter your choice: ");
switch (choice) { switch (choice) {
case 1: case 1:
movieService.displayGenres(); movieService.displayGenres();
break; break;
case 2:
case 2: Long genreId = getLongInput("Enter Genre ID: ");
// TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre() Long page = getLongInput("Enter Page Number: ");
movieService.displayMoviesByGenre(genreId, page);
break; break;
case 3: case 3:
// TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails() Long movieId = getLongInput("Enter Movie ID: ");
movieService.displayMovieDetails(movieId);
break; break;
case 0: case 0:
running = false; running = false;
System.out.println("Goodbye!"); System.out.println("Goodbye!");
break; break;
default: 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..."); System.out.println("\nPress Enter to continue...");
scanner.nextLine(); scanner.nextLine();
scanner.nextLine();
} }
} }
scanner.close(); scanner.close();
} }
private static void displayMenu() { private static void displayMenu() {
System.out.println("\n================================"); System.out.println("\n================================");
System.out.println(" MENU"); System.out.println(" MENU");
@@ -62,7 +49,6 @@ public class Main {
System.out.println("0. Exit"); System.out.println("0. Exit");
System.out.println("================================"); System.out.println("================================");
} }
private static int getIntInput(String prompt) { private static int getIntInput(String prompt) {
System.out.print(prompt); System.out.print(prompt);
while (!scanner.hasNextInt()) { while (!scanner.hasNextInt()) {
@@ -73,7 +59,6 @@ public class Main {
scanner.nextLine(); scanner.nextLine();
return input; return input;
} }
private static Long getLongInput(String prompt) { private static Long getLongInput(String prompt) {
System.out.print(prompt); System.out.print(prompt);
while (!scanner.hasNextLong()) { while (!scanner.hasNextLong()) {
+94 -7
View File
@@ -2,10 +2,6 @@ package movie.apis;
import java.util.List; import java.util.List;
/**
* Model class representing a movie
* Fields: id, title, genres, images
*/
public class Movie { public class Movie {
private Long id; private Long id;
@@ -15,10 +11,101 @@ public class Movie {
private String year; private String year;
private String imdb_rating; private String imdb_rating;
private String country; private String country;
private String director;
private List<String> actors;
private int runtime;
private String rated;
private String released;
private String plot;
private int imdb_votes;
private int metascore;
private String type;
private String writer;
private String awards;
// TODO: Create a constructor with all fields public Movie() {
}
// 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 Movie(Long id, String title, List<String> genres, List<String> images, String year,
String imdb_rating, String country, String director, List<String> actors,
int runtime, String rated, String released, String plot, int imdb_votes,
int metascore, String type, String writer, String awards) {
this.id = id;
this.title = title;
this.genres = genres;
this.images = images;
this.year = year;
this.imdb_rating = imdb_rating;
this.country = country;
this.director = director;
this.actors = actors;
this.runtime = runtime;
this.rated = rated;
this.released = released;
this.plot = plot;
this.imdb_votes = imdb_votes;
this.metascore = metascore;
this.type = type;
this.writer = writer;
this.awards = awards;
}
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 getDirector() { return director; }
public void setDirector(String director) { this.director = director; }
public List<String> getActors() { return actors; }
public void setActors(List<String> actors) { this.actors = actors; }
public int getRuntime() { return runtime; }
public void setRuntime(int 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 int getImdb_votes() { return imdb_votes; }
public void setImdb_votes(int imdb_votes) { this.imdb_votes = imdb_votes; }
public int getMetascore() { return metascore; }
public void setMetascore(int metascore) { this.metascore = metascore; }
public String getType() { return type; }
public void setType(String type) { this.type = type; }
public String getWriter() { return writer; }
public void setWriter(String writer) { this.writer = writer; }
public String getAwards() { return awards; }
public void setAwards(String awards) { this.awards = awards; }
} }
+65 -117
View File
@@ -23,53 +23,21 @@ public class MovieService {
HttpRequest request = HttpRequest.newBuilder() HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(GENRES_URL)) .uri(URI.create(GENRES_URL))
.build(); .build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() == 200) return response.body();
if (response.statusCode() == 200) { else throw new IOException("HTTP error code: " + response.statusCode());
System.out.println("Genres List received successfully");
return response.body();
} else {
throw new IOException("HTTP error code: " + response.statusCode());
}
} catch (Exception e) { } catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage()); System.out.println("!!Exception : " + e.getMessage());
} }
return null; return null;
} }
private String getMoviesByGenreList(Long genreId, Long page) {
try {
String url = "https://api.meshcomp.ir/api/v1/genres/" + genreId + "/movies?page=" + page;
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();
} else {
System.out.println("HTTP error code: " + response.statusCode());
return null;
}
} catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage());
}
return null;
}
public void displayGenres() { public void displayGenres() {
String jsonResponse = getGenresList(); String jsonResponse = getGenresList();
if (jsonResponse == null) { if (jsonResponse == null) {
System.out.println("Failed to get genres"); System.out.println("Failed to get genres");
return; return;
} }
try { try {
JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject(); JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
JsonArray genresArray = rootObject.getAsJsonArray("genres"); JsonArray genresArray = rootObject.getAsJsonArray("genres");
@@ -87,105 +55,85 @@ public class MovieService {
} }
} }
/** private String getMoviesByGenreList(Long genreId, Long page) {
* 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 { try {
// Your code here String url = "https://api.meshcomp.ir/api/v1/genres/" + genreId + "/movies?page=" + page;
HttpRequest request = HttpRequest.newBuilder()
} catch (Exception e) { .uri(URI.create(url))
System.err.println("ERROR: " + e.getMessage()); .build();
} HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
} if (response.statusCode() == 200) return response.body();
System.out.println("HTTP error code: " + response.statusCode());
/**
* 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();
return null;
} catch (Exception e) { } catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage()); System.out.println("!!Exception : " + e.getMessage());
} }
return null; return null;
} }
/* public void displayMoviesByGenre(Long genreId, Long page) {
BONUS TODO: Display complete movie details for a given movie ID try {
String jsonResponse = getMoviesByGenreList(genreId, page);
if (jsonResponse == null) {
System.out.println("Failed to get movies for genre " + genreId);
return;
}
JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
JsonArray moviesArray = rootObject.getAsJsonArray("movies");
Open this link in your browser (and check Pretty-print checkbox) to view json format: System.out.println("\nMovies in Genre ID: " + genreId + " | Page: " + page);
https://api.meshcomp.ir/api/v1/movies/1 for (JsonElement element : moviesArray) {
JsonObject movieObj = element.getAsJsonObject();
INSTRUCTIONS: Long id = movieObj.get("id").getAsLong();
1. Call getMovieById(movieId) to get the JSON response string String title = movieObj.get("title").getAsString();
2. Check if response is null (if yes, print error and return) String year = movieObj.get("year").getAsString();
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.
=======================================================================
*/
System.out.println("ID: " + id + " | " + title + " (" + year + ")");
}
Long total = rootObject.get("total").getAsLong();
Long totalPages = rootObject.get("total_pages").getAsLong();
System.out.println("\nTotal movies: " + total + " | Total pages: " + totalPages + "\n");
} 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()
.uri(URI.create(url))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() == 200) return response.body();
System.out.println("HTTP error code: " + response.statusCode());
} catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage());
}
return null;
}
public void displayMovieDetails(Long movieId) { public void displayMovieDetails(Long movieId) {
// Step 1: Get JSON response from API
String jsonResponse = getMovieById(movieId); 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) { if (jsonResponse == null) {
System.out.println("Failed to get movie details for ID: " + movieId); System.out.println("Failed to get movie details for ID: " + movieId);
return; return;
} }
try { try {
// TODO: Parse jsonResponse to JsonObject Gson gson = new Gson();
// HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject() Movie movie = gson.fromJson(jsonResponse, Movie.class);
// TODO: use Gson to parse the json
// Your code here: System.out.println("=======================================================================");
} catch (Exception e) { System.out.println(" " + movie.getTitle() + " (" + movie.getYear() + ")");
System.out.println("=======================================================================");
System.out.println("Rating: " + movie.getImdb_rating() + " | Votes: " + movie.getImdb_votes());
System.out.println("Director: " + movie.getDirector());
System.out.println("Cast: " + String.join(", ", movie.getActors()));
System.out.println("Genre: " + String.join(", ", movie.getGenres()));
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()); System.err.println("ERROR parsing movie details: " + e.getMessage());
} }
} }