Matin-Ardestani/HW-03-oop-and-api
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Merge pull request 'Complete code + Bonus' (#1) from develop into main

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Reviewed-on: #1
This commit was merged in pull request #1.
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peyman
2026-05-07 19:15:01 +00:00
parent 6a01e43eb2 b901078b61
commit 52ddc3e07c
4 changed files with 199 additions and 76 deletions
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src/main/java/Rational/Rational.java
+16 -14
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@@ -54,42 +54,44 @@ 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 IllegalArgumentException("Denominator 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
+5 -3
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@@ -22,14 +22,16 @@ public class Main {
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:
src/main/java/movie/apis/Movie.java
+139
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@@ -15,10 +15,149 @@ public class Movie {
private String year;
private String imdb_rating;
private String country;
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 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 Long getId() {
return id;
}
public String getTitle() {
return title;
}
public List<String> getGenres() {
return genres;
}
public List<String> getImages() {
return images;
}
public String getImdb_rating() {
return imdb_rating;
}
public String getYear() {
return year;
}
public String getCountry() {
return country;
}
public String getActors() {
return actors;
}
public String getAwards() {
return awards;
}
public String getDirector() {
return director;
}
public String getImdb_id() {
return imdb_id;
}
public String getImdb_votes() {
return imdb_votes;
}
public String getMetascore() {
return metascore;
}
public String getPlot() {
return plot;
}
public String getRated() {
return rated;
}
public String getReleased() {
return released;
}
public String getRuntime() {
return runtime;
}
public String getType() {
return type;
}
public String getWriter() {
return writer;
}
public void setGenres(List<String> genres) {
this.genres = genres;
}
public void setImages(List<String> images) {
this.images = images;
}
public void setImdb_rating(String imdb_rating) {
this.imdb_rating = imdb_rating;
}
public void setYear(String year) {
this.year = year;
}
public void setAwards(String awards) {
this.year = awards;
}
public void setDirector(String director) {
this.year = director;
}
public void setMetascoret(String metascore) {
this.year = metascore;
}
public void setPlot(String plot) {
this.year = plot;
}
public void setImdb_id(String imdb_id) {
this.year = imdb_id;
}
public void setImdb_votes(String imdb_votes) {
this.year = imdb_votes;
}
public void setRated(String rated) {
this.year = rated;
}
public void setReleased(String released) {
this.year = released;
}
public void setType(String type) {
this.year = type;
}
public void setRuntime(String runtime) {
this.year = runtime;
}
public void setWriter(String writer) {
this.year = writer;
}
public void setCountry(String country) {
this.country = country;
}
@Override
public String toString() {
return id + ". " + title;
}
}
src/main/java/movie/apis/MovieService.java
+39 -59
View File
@@ -87,26 +87,27 @@ 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
String jsonAsString = getMoviesByGenreList(genreId, page);
JsonObject jsonObj = JsonParser.parseString(jsonAsString).getAsJsonObject();
JsonArray moviesArray = jsonObj.getAsJsonArray("movies");
List<Movie> movies = new ArrayList<>();
for(JsonElement movie : moviesArray){
JsonObject movieAsObj = movie.getAsJsonObject();
System.out.printf("ID: %d | %s (%d)\n\n",
movieAsObj.get("id").getAsLong(), movieAsObj.get("title").getAsString(), movieAsObj.get("year").getAsLong());
movies.add(new Movie(movieAsObj.get("id").getAsLong(),
movieAsObj.get("title").getAsString()));
}
System.out.printf("Total: %d, total_pages: %d\n\n",
jsonObj.get("total").getAsLong(), jsonObj.get("total_pages").getAsLong());
} catch (Exception e) {
System.err.println("ERROR: " + e.getMessage());
@@ -121,10 +122,10 @@ 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) {
@@ -133,46 +134,10 @@ public class MovieService {
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);
// System.out.println(jsonResponse + "\n");
// Step 2: Check if we got valid data
// Step 3-5: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch)
@@ -183,8 +148,23 @@ public class MovieService {
try {
// TODO: Parse jsonResponse to JsonObject
// HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
JsonObject moviesObj = JsonParser.parseString(jsonResponse).getAsJsonObject();
// TODO: use Gson to parse the json
// Your code here:
Gson gson = new Gson();
Movie movie = gson.fromJson(moviesObj, Movie.class);
String output = " =======================================================================\n" +
" "+ movie.getTitle() +"\n" +
" =======================================================================\n" +
" Rating: "+ movie.getImdb_rating() +" | Votes: "+ movie.getImdb_votes() + "\n" +
" Director: "+ movie.getDirector() +"\n" +
" Cast: "+ movie.getActors() +"\n" +
" Genre: "+ movie.getGenres() +"\n" +
" Runtime: "+ movie.getRuntime() +" | Rated: "+ movie.getRated() +"\n" +
" Country: "+ movie.getCountry() +" | Released: "+ movie.getReleased() +"\n" +
" Plot: " + movie.getPlot() +
"\n =======================================================================";
System.out.println(output);
} catch (Exception e) {
System.err.println("ERROR parsing movie details: " + e.getMessage());
}