Added all suggested changes from the comments by reviewers

client/src/main/java/client/utils/Config.java

@@ -5,14 +5,11 @@ import java.util.List;
 
 public class Config {
 
-    /*
-    Sets parameters for what the config file needs with a config
-     Object that will be used in the ConfigService object
-     */
+
     private String language = "en";
     private String serverUrl = "http://localhost:8080";
 
-    private List<String> favourites = new ArrayList<>();
+    private List<Long> favourites = new ArrayList<>();
     private List<String> shoppingList = new ArrayList<>();
 
     public Config(){}
@@ -25,7 +22,7 @@ public class Config {
         return shoppingList;
     }
 
-    public List<String> getFavourites() {
+    public List<Long> getFavourites() {
         return favourites;
     }
 
@@ -41,7 +38,7 @@ public class Config {
         this.serverUrl = serverUrl;
     }
 
-    public void setFavourites(List<String> favourites) {
+    public void setFavourites(List<Long> favourites) {
         this.favourites = favourites;
     }
 

client/src/main/java/client/utils/ConfigService.java

@@ -31,21 +31,18 @@ public class ConfigService {
      */
     private void load(){
         File file = configPath.toFile(); //reads the config file as file
-        if(file.exists()){
+        if (!file.exists()) {           //if file doesn't exist then it creates a config object
+            config = new Config();
+            return;
+        }
+
         try{
             config = mapper.readValue(file, Config.class); //uses Jackson to map the file to the config attribute
 
-            } catch (StreamReadException e) {
-                throw new RuntimeException(e);
-            } catch (DatabindException e) {
-                throw new RuntimeException(e);
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
-        }
-        else{
-            config = new Config(); // if file doesn't exist, it creates one
-        }
+
     }
 
     public Path getConfigPath() {

client/src/test/java/client/scenes/ConfigServiceTest.java

@@ -48,9 +48,9 @@ public class ConfigServiceTest {
         assertEquals("de", config.getLanguage());
         assertEquals("http://exmple12.com", config.getServerUrl());
 
-        List<String> x = new ArrayList<>();
-        x.add("banana bread");
-        x.add("pineapple pie");
+        List<Long> x = new ArrayList<>();
+        x.add(23412L);
+        x.add(25412L);
 
         List<String> y = new ArrayList<>();
         y.add("milk");

client/src/test/java/client/scenes/ConfigTest.java

@@ -39,8 +39,11 @@ public class ConfigTest {
         ArrayList<String> x = new ArrayList<>();
         x.add("Lava Cake");
         x.add("Brownie");
-        config.setFavourites(x);
-        assertEquals(config.getFavourites(), x);
+        ArrayList<Long> y = new ArrayList<>();
+        y.add(1234L);
+        y.add(1235L);
+        config.setFavourites(y);
+        assertEquals(config.getFavourites(), y);
         config.setShoppingList(x);
         assertEquals(config.getShoppingList(), x);
     }