Trying to create the develop method

app/src/main/java/fr/romanet/vj/apps/myweather/ICityService.java

@@ -24,6 +24,11 @@ public interface ICityService
      */
     void addCity(City cityToAdd);
 
+    /**
+     * Updating the fields of a specific city
+     */
+    void updateCity(City cityToUpdate);
+
     /**
      * Get all cities sorted by name
      * @return {@link List}

app/src/main/java/fr/romanet/vj/apps/myweather/bo/City.java

@@ -30,7 +30,7 @@ final public class City implements Serializable
     }
 
     /**
-     * The primary key of the city in our datbase which is automatically incremented
+     * The primary key of the city in our database which is automatically incremented
      */
     @PrimaryKey(autoGenerate = true)
     public int id;
@@ -40,16 +40,21 @@ final public class City implements Serializable
      */
     @NonNull
     public String nameCity;
+
     @Nullable
-    public String w_icon;
+    public String w_icon = null;
+
     @Nullable
-    public String w_temp;
+    public String w_temp = null;
+
     @Nullable
-    public String w_feelsliketemp;
+    public String w_feelsliketemp = null;
+
     @Nullable
-    public String w_mintemp;
+    public String w_mintemp = null;
+
     @Nullable
-    public String w_maxtemp;
+    public String w_maxtemp = null;
 
     /**
      * Constructor of the city class
@@ -61,6 +66,26 @@ final public class City implements Serializable
         this.nameCity = nameCity;
     }
 
+    public void setW_icon(@Nullable String w_icon) {
+        this.w_icon = w_icon;
+    }
+
+    public void setW_temp(@Nullable String w_temp) {
+        this.w_temp = w_temp;
+    }
+
+    public void setW_feelsliketemp(@Nullable String w_feelsliketemp) {
+        this.w_feelsliketemp = w_feelsliketemp;
+    }
+
+    public void setW_mintemp(@Nullable String w_mintemp) {
+        this.w_mintemp = w_mintemp;
+    }
+
+    public void setW_maxtemp(@Nullable String w_maxtemp) {
+        this.w_maxtemp = w_maxtemp;
+    }
+
     /**
      * Equals function that return true or false weither both name are same and both object belongs to City class
      * @param o The object to compare
@@ -68,26 +93,20 @@ final public class City implements Serializable
      */
     @Override
     public boolean equals(Object o) {
-        if (this == o)
+        if (this == o) return true;
-        {
+        if (o == null || getClass() != o.getClass()) return false;
-            return true;
+        City city = (City) o;
-        }
+        return id == city.id &&
-        if (o == null || getClass() != o.getClass())
+                nameCity.equals(city.nameCity) &&
-        {
+                Objects.equals(w_icon, city.w_icon) &&
-            return false;
+                Objects.equals(w_temp, city.w_temp) &&
-        }
+                Objects.equals(w_feelsliketemp, city.w_feelsliketemp) &&
-        City city1 = (City) o;
+                Objects.equals(w_mintemp, city.w_mintemp) &&
-
+                Objects.equals(w_maxtemp, city.w_maxtemp);
-        return nameCity.equals(city1.nameCity);
     }
 
-    /**
-     * hashCode function
-     * @return Clé de hashage (int)
-     */
     @Override
-    public int hashCode()
+    public int hashCode() {
-    {
+        return Objects.hash(id, nameCity, w_icon, w_temp, w_feelsliketemp, w_mintemp, w_maxtemp);
-        return Objects.hash(nameCity);
     }
 }

app/src/main/java/fr/romanet/vj/apps/myweather/dao/CityDao.java

@@ -5,6 +5,8 @@ import androidx.room.Delete;
 import androidx.room.Insert;
 import androidx.room.OnConflictStrategy;
 import androidx.room.Query;
+import androidx.room.Update;
+
 import fr.romanet.vj.apps.myweather.ICityService;
 import fr.romanet.vj.apps.myweather.bo.City;
 import java.util.List;
@@ -24,7 +26,11 @@ public interface CityDao extends ICityService
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     void addCity(City cityToAdd);
 
+    @Update
+    void updateCity(City cityToUpdate);
+
     @Override
     @Query("SELECT * FROM City ORDER BY nameCity DESC")
     List<City> sortCityByName();
+
 }

app/src/main/java/fr/romanet/vj/apps/myweather/repository/CityRepository.java

@@ -48,6 +48,8 @@ public final class CityRepository
         cityDatabase.cityDao().addCity(cityToAdd);
     }
 
+    public void updateCity(City cityToUpdate) {cityDatabase.cityDao().updateCity(cityToUpdate);}
+
     public List<City> sortCityByName()
     {
         return cityDatabase.cityDao().sortCityByName();