Matin.Mortazavi/HW-03-oop-and-api
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matin mortazavi #1

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Meraj merged 1 commits from develop into main 2026-05-19 16:34:10 +00:00
Conversation 2 Commits 1 Files Changed 5
+165 -19
5 changed files with 165 additions and 19 deletions
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src/main/java/Rational/Rational.java
+41 -6
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@@ -55,26 +55,42 @@ public class Rational {
// 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)-((this.denominator)*other.numerator) ;
int NewDenominator = (this.denominator)*other.denominator;
return new Rational(NewNumerator ,NewDenominator);
// Remove this line when implemented
}
// TODO: Static method - r1 - r2
public static Rational subtract(Rational r1, Rational r2) {
// YOUR CODE HERE
return null; // Remove this line when implemented
int NewNumerator = (r1.numerator* r2.denominator)-(r1.denominator* r2.numerator) ;
int NewDenominator = r1.denominator* r2.denominator ;
return new Rational(NewNumerator ,NewDenominator);
}
// 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) {
int NewNumerator = r1.numerator* r2.numerator ;
int NewDenominator = r1.denominator* r2.denominator ;
return new Rational(NewNumerator ,NewDenominator);
// YOUR CODE HERE
return null; // Remove this line when implemented
//return null; // Remove this line when implemented
}
// TODO: Instance method - this / other
@@ -83,13 +99,32 @@ public class Rational {
// 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
// return null; // Remove this line when implemented
if (other.numerator == 0 )
{
throw new ArithmeticException("cannot divide ") ;
}
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
if (r2.numerator == 0 )
{
throw new ArithmeticException("cannot divide ") ;
}
int NewNumerator = r1.numerator * r2.denominator ;
int NewDenominator = r1.denominator * r2.numerator ;
return new Rational(NewNumerator ,NewDenominator);
//return null; // Remove this line when implemented
}
// PROVIDED - String representation
src/main/java/movie/apis/Genre.java
+6 -1
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@@ -4,9 +4,11 @@ public class Genre {
private Long id;
private String name;
public Genre(Long id, String name) {
public Genre(Long id, String name ) {
this.id = id;
this.name = name;
}
public Genre() {
@@ -28,6 +30,9 @@ public class Genre {
this.name = name;
}
@Override
public String toString() {
return id + ". " + name;
src/main/java/movie/apis/Main.java
+8 -1
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@@ -22,12 +22,19 @@ 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;
src/main/java/movie/apis/Movie.java
+70
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@@ -17,6 +17,76 @@ public class Movie {
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 ;
}
public Movie(Long id , String title)
{
this.id = id ;
this.title = title ;
}
public Movie(){}
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 ;
}
// TODO: Create a simple constructor with id and title only
src/main/java/movie/apis/MovieService.java
+40 -11
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@@ -107,7 +107,23 @@ public class MovieService {
// All parsing code must be inside try-catch
try {
// Your code here
String json_res = getMoviesByGenreList(genreId , page);
if (json_res == null)
{
System.out.println("no data ");
return;
}
JsonObject root = JsonParser.parseString(json_res).getAsJsonObject() ;
JsonArray movie_arr = root.getAsJsonArray("movies") ;
Gson gson = new Gson() ;
Type movieListType = new TypeToken<ArrayList<Movie>>(){}.getType();
List<Movie> movies = gson.fromJson(movie_arr, movieListType);
long total = root.get("total").getAsLong();
long totalPages = root.get("total_pages").getAsLong();
System.out.println("Page " + page + " of " + totalPages + " (Total movies: " + total + ")");
for (Movie m : movies) {
System.out.println("ID: " + m.getId() + " | " + m.getTitle() + " (" + m.getYear() + ")");
}
} catch (Exception e) {
System.err.println("ERROR: " + e.getMessage());
}
@@ -121,12 +137,16 @@ 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();
else {
throw new IOException("HTTP error code: " + response.statusCode());
}
return null;
} catch (Exception e) {
System.out.println("!!Exception : " + e.getMessage());
}
@@ -170,10 +190,12 @@ public class MovieService {
*/
public void displayMovieDetails(Long movieId) {
/*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) {
@@ -181,12 +203,19 @@ public class MovieService {
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) {
System.err.println("ERROR parsing movie details: " + e.getMessage());
}
}
// TODO: Parse jsonResponse to JsonObject
// HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
// TODO: use Gson to parse the json
// Your code here:
} catch (Exception e) {
System.err.println("ERROR parsing movie details: " + e.getMessage());
}
}*/
}