HW03

pom.xml

@@ -28,5 +28,17 @@
             <version>2.17.2</version>
         </dependency>
     </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>25</source>
+                    <target>25</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 
 </project>

src/main/java/Rational/Rational.java

@@ -54,27 +54,31 @@ 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-this.denominator*other.numerator;
+        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
+        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) {
-        // YOUR CODE HERE
-        return null; // Remove this line when implemented
+        int newNumerator=r1.numerator*r2.numerator;
+        int newDenominator= r1.denominator*r2.denominator;
+        return new Rational(newNumerator, newDenominator);
     }
 
     // TODO: Instance method - this / other
@@ -83,13 +87,29 @@ 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
+        int newNumerator;
+        int newDenominator;
+        if (other.numerator==0){
+            throw new IllegalArgumentException(other+" should not be zero");
+        }
+        else{
+            newNumerator= this.numerator*other.denominator;
+            newDenominator=this.denominator*other.denominator;
+        }
+        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
+        int newNumerator; int newDenominator;
+        if (r2.numerator==0){
+            throw new IllegalArgumentException(r2.numerator+" shouldn't be zero");
+        }
+        else{
+            newNumerator=r1.numerator*r2.denominator;
+            newDenominator=r1.denominator*r2.numerator;
+        }
+        return new Rational(newNumerator, newDenominator); // Remove this line when implemented
     }
 
     //  PROVIDED - String representation

src/main/java/movie/apis/Main.java

@@ -22,6 +22,10 @@ public class Main {
 
                 case 2:
                     // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre()
+                    Scanner input = new Scanner(System.in);
+                    Long genreID= input.nextLong();
+                    Long page=input.nextLong();
+                    movieService.displayMoviesByGenre(genreID, page);
 
                     break;
 

src/main/java/movie/apis/Movie.java

@@ -1,5 +1,8 @@
 package movie.apis;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -10,15 +13,65 @@ public class Movie {
 
     private Long id;
     private String title;
+    @JsonProperty("genre")
     private List<String> genres;
     private List<String> images;
     private String year;
     private String imdb_rating;
     private String country;
-
+    public Movie(){};
     // 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 idGetter(){
+        return id;
+    }
+    public String titleGetter(){
+        return title;
+    }
+    public List<String> genresGetter(){
+        return genres;
+    }
+    public List<String> imagesGetter(){
+        return images;
+    }
+    public String yearGetter(){
+        return year;
+    }
+    public String Imdb_ratingGetter(){
+        return imdb_rating;
+    }
+    public String countryGetter(){
+        return country;
+    }
+    public void setId(Long id){
+        this.id=id;
+    }
+    public void setTitle(String title){
+        this.title=title;
+    }
+    public void setGenres(List<String> genres){
+        this.genres= new ArrayList<>(genres);
+    }
+    public void setImages(List<String> images){
+        this.images= new ArrayList<>(images);  //for privacy stuff
+    }
+    public void setYear(String year){
+        this.year=year;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public void setImdb_rating(String imdb_rating) {
+        this.imdb_rating = imdb_rating;
+    }
 }

src/main/java/movie/apis/MovieService.java

@@ -1,5 +1,7 @@
 package movie.apis;
 
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.gson.*;
 import com.google.gson.reflect.TypeToken;
 
@@ -106,12 +108,16 @@ public class MovieService {
         // TODO: Write your code here
         // All parsing code must be inside try-catch
         try {
-            // Your code here
-
-        } catch (Exception e) {
+            String json= getMoviesByGenreList(genreId, page);
+            ObjectMapper mapper= new ObjectMapper();
+            Movie m = mapper.readValue(json, Movie.class);
+            System.out.println("ID: " + m.idGetter() + "\nTitle: " + m.titleGetter() + "\nYear: " + m.yearGetter());
+        }
+        catch (Exception e) {
             System.err.println("ERROR: " + e.getMessage());
         }
-    }
+        }
+
 
 
     /**