develop #1

Merged
Meraj merged 6 commits from develop into main 2026-05-18 17:25:13 +00:00
4 changed files with 446 additions and 105 deletions
+17 -20
View File
@@ -51,45 +51,42 @@ 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)
{
System.out.println("Numerator of the second number cannot be 0!");
return null;
}
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
+16 -5
View File
@@ -21,14 +21,25 @@ public class Main {
break;
case 2:
// TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre()
long id = getLongInput("Enter genre ID: ");
long page = getLongInput("Enter page number: ");
movieService.displayMoviesByGenre(id, page);
break;
case 3:
// TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails()
System.out.println("Enter movie ID to see details: ");
if (scanner.hasNextLong())
{
Long movieId = scanner.nextLong();
System.out.println("---Fetching movie details---");
movieService.displayMovieDetails(movieId);
}
else
{
System.out.println("Invalid ID.");
scanner.next();
}
break;
@@ -45,7 +56,7 @@ public class Main {
if (running) {
System.out.println("\nPress Enter to continue...");
scanner.nextLine();
scanner.nextLine();
//scanner.nextLine();
}
}
+182 -3
View File
@@ -16,9 +16,188 @@ public class Movie {
private String imdb_rating;
private String country;
// TODO: Create a constructor with all fields
private String actors;
private String awards;
private String director;
private String imdb_id;
private String imdb_votes;
private String metaScore;
private String plot;
private String rated;
private String released;
private String runtime;
private String type;
private String writer;
// TODO: Create a simple constructor with id and title only
// 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)
{
this.id = id;
this.title = title;
this.genres = genres;
this.images = images;
this.year = year;
this.imdb_rating = imdb_rating;
this.country = country;
}
public Movie(long id, String title)
{
this.id = id;
this.title = title;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
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 getActors() {
return actors;
}
public void setActors(String actors) {
this.actors = actors;
}
public String getAwards() {
return awards;
}
public void setAwards(String awards) {
this.awards = awards;
}
public String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public String getImdb_id() {
return imdb_id;
}
public void setImdb_id(String imdb_id) {
this.imdb_id = imdb_id;
}
public String getImdb_votes() {
return imdb_votes;
}
public void setImdb_votes(String imdb_votes) {
this.imdb_votes = imdb_votes;
}
public String getMetaScore() {
return metaScore;
}
public void setMetaScore(String metaScore) {
this.metaScore = metaScore;
}
public String getPlot() {
return plot;
}
public void setPlot(String plot) {
this.plot = plot;
}
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 getRuntime() {
return runtime;
}
public void setRuntime(String runtime) {
this.runtime = runtime;
}
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;
}
}
+231 -77
View File
@@ -11,6 +11,8 @@ import java.net.http.HttpResponse;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.InputMismatchException;
public class MovieService {
@@ -87,105 +89,257 @@ 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
public List<Movie> parseMoviesFromJson(String json)
{
if (json == null || json.isEmpty())
{
return new ArrayList<>();
}
Gson gson = new Gson();
Type listType = new TypeToken<ArrayList<Movie>>() {}.getType();
return gson.fromJson(json, listType);
}
} catch (Exception e) {
System.err.println("ERROR: " + e.getMessage());
public void displayListOfMovies()
{
Scanner scanner = new Scanner(System.in);
Long selectedGenreId = null;
System.out.println("---Select a genre---");
displayGenres();
System.out.println("Enter the genre ID to view movies or 0 to exit: ");
try
{
if (scanner.hasNextLong())
{
selectedGenreId = scanner.nextLong();
}
else
{
System.out.println("Invalid! Enter a number.");
return;
}
}
catch (InputMismatchException e)
{
System.out.println("Invalid input. Please enter a number.");
scanner.next();
return;
}
if (selectedGenreId == 0)
{
return;
}
System.out.println("----Movies for genre ID: " + selectedGenreId + "----");
Long page = 1L;
try
{
String json = getMoviesByGenreList(selectedGenreId, page);
if (json == null || json.isEmpty())
{
System.out.println("No movies found.");
return;
}
JsonObject rootObject = JsonParser.parseString(json).getAsJsonObject();
JsonArray moviesArray = rootObject.getAsJsonArray("movies");
if (moviesArray == null || moviesArray.isEmpty())
{
System.out.println("No movies found.");
return;
}
Gson gson = new Gson();
Type listType = new TypeToken<ArrayList<Movie>>() {}.getType();
List<Movie> movies = gson.fromJson(moviesArray, listType);
if (movies != null && !movies.isEmpty())
{
for (Movie movie : movies)
{
System.out.println("ID: " + movie.getId() + " | " + movie.getTitle() + " (" + movie.getYear() + ")");
}
}
else
{
System.out.println("No movies found for this genre.");
}
}
catch (Exception e)
{
System.err.println("ERROR displaying movies: " + e.getMessage());
e.printStackTrace();
}
}
public void displayMoviesByGenre(Long genreId, Long page) {
try
{
String json = getMoviesByGenreList(genreId, page);
JsonObject rootObject = JsonParser.parseString(json).getAsJsonObject();
JsonArray moviesArray = rootObject.getAsJsonArray("movies");
if (moviesArray == null || moviesArray.isEmpty())
{
System.out.println("No movies found for this genre/page.");
return;
}
Gson gson = new Gson();
Type listType = new TypeToken<ArrayList<Movie>>() {}.getType();
List<Movie> movies = gson.fromJson(moviesArray, listType);
if (rootObject.has("total"))
{
int total = rootObject.get("total").getAsInt();
System.out.println("Total movies: " + total);
}
if (rootObject.has("total_pages"))
{
int totalPages = rootObject.get("total_pages").getAsInt();
System.out.println("Total pages: " + totalPages);
}
System.out.println("\n====================");
for (Movie movie: movies)
{
System.out.println("ID: " + movie.getId() + " | " + movie.getTitle() + " (" + movie.getYear() + ")");
}
System.out.println("--------------------\n");
}
catch (Exception e)
{
System.err.println("ERROR parsing movie list: " + e.getMessage());
e.printStackTrace();
}
}
/**
* 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;
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();
} else
{
System.out.println("HTTP error code for movie ID " + movieId + ": " + response.statusCode());
return null;
}
} catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage());
}
return null;
}
/*
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
// 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:
} catch (Exception e) {
JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
Movie movie;
if (rootObject.has("movie"))
{
String movieJson = rootObject.get("movie").toString();
movie = new Gson().fromJson(movieJson, Movie.class);
} else
{
movie = new Gson().fromJson(jsonResponse, Movie.class);
}
if (movie == null)
{
System.err.println("Error: Movie object could not be parsed.");
return;
}
int width = 60;
String title = (movie.getTitle() != null ? movie.getTitle() : "Unknown Title");
String year = (movie.getYear() != null ? movie.getYear() : "");
String titleYear = title + (year.isEmpty() ? "" : " (" + year + ")");
if (titleYear.length() > width) {
width = titleYear.length() + 10;
}
int totalPadding = width - titleYear.length();
int leftPadding = totalPadding / 2;
int rightPadding = totalPadding - leftPadding;
String centeredTitle = " ".repeat(leftPadding) + titleYear.toUpperCase() + " ".repeat(rightPadding);
System.out.println("=============================================================");
System.out.println(centeredTitle);
System.out.println("=============================================================");
if (movie.getImdb_rating() != null && !movie.getImdb_rating().isEmpty())
{
try
{
double rating = Double.parseDouble(movie.getImdb_rating());
System.out.printf("Rating: %.1f/10", rating);
if (movie.getImdb_votes() != null && !movie.getImdb_votes().isEmpty())
{
String votesStr = movie.getImdb_votes().replace(",", "");
long votes = Long.parseLong(votesStr);
System.out.printf(" | Votes: %,d%n", votes);
} else
{
System.out.println();
}
} catch (NumberFormatException e)
{
System.out.println("Rating: " + movie.getImdb_rating() + " (Format Error)");
}
} else
{
System.out.println("Rating: N/A");
}
if (movie.getDirector() != null)
{
System.out.println("Director: " + movie.getDirector());
}
if (movie.getActors() != null)
{
System.out.println("Cast: " + movie.getActors());
}
if (movie.getGenres() != null && !movie.getGenres().isEmpty())
{
String genresStr = String.join(" , ", movie.getGenres());
System.out.println("Genre: " + genresStr);
} else
{
System.out.println("Genre: N/A");
}
if (movie.getRuntime() != null)
{
System.out.println("Runtime: " + movie.getRuntime() + " | Rated: " + movie.getRated());
}
if (movie.getCountry() != null)
{
System.out.println("Country: " + movie.getCountry() + " | Released: " + movie.getReleased());
}
if (movie.getPlot() != null)
{
System.out.println("Plot: " + movie.getPlot());
}
if (movie.getAwards() != null)
{
System.out.println("Awards: " + movie.getAwards());
}
System.out.println("=======================================================================");
} catch (Exception e)
{
System.err.println("ERROR parsing movie details: " + e.getMessage());
}
}