optimized Main Class. added Method quit to UserInterface.java

src/main/java/ch/zhaw/pm2/racetrack/Game.java

@@ -190,7 +190,7 @@ public class Game implements GameSpecification {
         }
     }
 
-    public int gamePhase() throws PositionVectorNotValid {
+    public String gamePhase() throws PositionVectorNotValid {
         while (CarsMoving() && getWinner() == NO_WINNER) {
             userInterface.printTrack(track);
             Direction direction = null;
@@ -203,7 +203,11 @@ public class Game implements GameSpecification {
             switchToNextActiveCar();
         }
         userInterface.printTrack(track);
-        return getWinner();
+        int indexWinner = getWinner();
+        if(indexWinner == NO_WINNER){
+            return null;
+        }
+        return String.valueOf(track.getCar(indexWinner).getID());
     }
 
     /**

src/main/java/ch/zhaw/pm2/racetrack/Main.java

@@ -7,23 +7,34 @@ import java.util.List;
 public class Main {
 
     public static void main(String[] args) throws InvalidTrackFormatException, FileNotFoundException, PositionVectorNotValid {
-        boolean exit = false;
+        UserInterface userInterface = new UserInterface("Hello and Welcome to Racetrack by Team02-\"AngryNerds\"");
-        UserInterface userInterface = new UserInterface("Hello and Welcome");
+        while (true) {
-        while (!exit) {
             Game game = new Game(userInterface);
-            int winner = 0;
+            String winner;
             if (game.initPhase()) {
                 winner = game.gamePhase();
-            }
                 List<String> optionsNewGame = new ArrayList<>();
                 optionsNewGame.add("exit");
                 optionsNewGame.add("new game");
-            int selectedOption = userInterface.selectOption("The Winner was Car : " + winner + "\nStart new Game?", optionsNewGame);
+                String winnerText;
+                if(winner == null){
+                    winnerText = "There was no winner.";
+                }
+                else {
+                    winnerText = "The Winner was Car " + winner;
+                }
+                int selectedOption = userInterface.selectOption(winnerText + "\nStart new Game?", optionsNewGame);
                 if(selectedOption == 0) {
-                exit = true;
+                    userInterface.quit("Thank you and goodbye\npress enter to close the application.");
+                    break;
                 }
             }
-        userInterface.printInformation("Thank you and goodbye");
+            else {
+                userInterface.quit("The initialisation of the game failed. Press enter to close the application.");
+                break;
+            }
+        }
+
     }
 
 }

src/main/java/ch/zhaw/pm2/racetrack/UserInterface.java

@@ -97,6 +97,15 @@ public class UserInterface {
             textTerminal.println(track.toString());
     }
 
+    /**
+     * Method to dispose the Textterminal
+     * @param text OUtput Text
+     */
+    public void quit(String text){
+        textIO.newStringInputReader().withMinLength(0).read(text);
+        textTerminal.dispose();
+    }
+
 
 
 }