app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Participant.java

@@ -2,9 +2,38 @@ package ch.zhaw.projekt2.turnierverwaltung;
 
 import java.io.Serializable;
 
+/**
+ * Interface that defines the common functionality of a Participant, used by Players and Teams
+ */
 public interface Participant extends Serializable {
+    /**
+     * Method that will be used to get
+     *
+     * @return the name
+     */
     String getName();
-    void setName(String name);
+
+    /**
+     * Method to set a participants name
+     *
+     * @param name to be set
+     * @throws InvalidNameException if the name does not follow the correct format
+     */
+    void setName(String name) throws InvalidNameException;
+
+    /**
+     * Method to compare two participants with each other
+     *
+     * @param participant to be compared to the current instance
+     * @return true if equal, false if not
+     */
     boolean equals(Participant participant);
-    void change(Participant participant);
+
+    /**
+     * Method to  change out participants
+     *
+     * @param participant to be exchanged
+     * @throws Person.InvalidPhoneNumberException if phone number does not follow the correct formatting
+     */
+    void change(Participant participant) throws Person.InvalidPhoneNumberException;
 }

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Person.java

@@ -1,56 +1,113 @@
 package ch.zhaw.projekt2.turnierverwaltung;
 
 import java.io.Serializable;
+import java.util.logging.Logger;
 
+/**
+ * Class that represents a person and holds its attributes
+ */
 public class Person implements Serializable {
     private final String NAME_MATCHING_REGEX = "[a-zA-Z]{1,20}";
-    private final String PHONE_MATCHING_REGEX = "[\\+]?[0-9]*";
+    private final String PHONE_MATCHING_REGEX = "[+]?[0-9]*";
 
     private String name;
     private String firstName;
     private String phoneNumber;
 
+    private static final Logger logger = Logger.getLogger(FileIO.class.getCanonicalName());
+
+
+    /**
+     * Constructor to initialize a person, also in charge of checking if name and phone number follow a valid format
+     *
+     * @param firstName   of the new person
+     * @param name        of the new person
+     * @param phoneNumber of the new person
+     * @throws InvalidNameException        thrown when the name or firstname does not follow the valid format
+     * @throws InvalidPhoneNumberException thrown when the number does not follow a valid format
+     */
     public Person(String firstName, String name, String phoneNumber) throws InvalidNameException, InvalidPhoneNumberException {
-        if(!firstName.matches(NAME_MATCHING_REGEX)){
-            throw new InvalidNameException("The First name is Invalid.");
-        } else if(!name.matches(NAME_MATCHING_REGEX)){
-            throw new InvalidNameException("The Last name is Invalid");
-        } else if(!phoneNumber.matches(PHONE_MATCHING_REGEX)){
-            throw new InvalidPhoneNumberException("The entered Phone Number is invalid.");
-        }
+        logger.finer("Trying to initialize a new person with name: " + name + ", first name: "
+                + firstName + ", Phone number: " + phoneNumber);
+
         setFirstName(firstName);
         setName(name);
         setPhoneNumber(phoneNumber);
+        logger.fine("Successfully created a new Person with Name: " + name + ", Firstname: "
+                + firstName + ", Phone number: " + phoneNumber);
     }
 
+    /**
+     * Method to return the name of a Person
+     *
+     * @return the name as String
+     */
     public String getName() {
+        logger.fine("Returning name of:" + name);
         return name;
     }
 
-    public void setName(String name) {
+    /**
+     * Method to set the name of a Person
+     *
+     * @param name of the person to be set
+     */
+    public void setName(String name) throws InvalidNameException {
+        if (!name.matches(NAME_MATCHING_REGEX)) {
+            logger.warning("Name: " + name + ", is not in a valid format");
+            throw new InvalidNameException("The Last name is Invalid");
+        }
+        logger.fine("Setting new name of " + this + " with: " + name);
         this.name = name;
     }
 
     public String getFirstName() {
+        logger.fine("Returning firstname of " + this + "that is: " + firstName);
         return firstName;
     }
 
-    public void setFirstName(String firstName) {
+    /**
+     * Method to set the first name of a Person
+     *
+     * @param firstName the person to be set
+     */
+    public void setFirstName(String firstName) throws InvalidNameException {
+        if (!firstName.matches(NAME_MATCHING_REGEX)) {
+            logger.warning("First name: " + firstName + ", is not in a valid format");
+            throw new InvalidNameException("The First name is Invalid.");
+        }
+        logger.fine("Setting new first name of " + this + " with: " + firstName);
         this.firstName = firstName;
     }
 
+    /**
+     * Method used to get the Phone number of a Person
+     *
+     * @return phone number of the person
+     */
     public String getPhoneNumber() {
+        logger.fine("returning phone number of " + this + "that is: " + phoneNumber);
         return phoneNumber;
     }
 
-    public void setPhoneNumber(String phoneNumber) {
+    /**
+     * Method used to set the Phone number of a Person
+     *
+     * @param phoneNumber to be set
+     */
+    public void setPhoneNumber(String phoneNumber) throws InvalidPhoneNumberException {
+        if (!phoneNumber.matches(PHONE_MATCHING_REGEX)) {
+            logger.warning("Phone number: " + phoneNumber + ", is not in a valid format");
+            throw new InvalidPhoneNumberException("The entered Phone Number is invalid.");
+        }
+        logger.fine("Setting new phone number of " + this + " with: " + phoneNumber);
         this.phoneNumber = phoneNumber;
     }
 
-    public class InvalidPhoneNumberException extends Exception {
-        public InvalidPhoneNumberException() {
-            super();
-        }
+    /**
+     * Exception, that is used when a Phone number is in an invalid format.
+     */
+    public static class InvalidPhoneNumberException extends Exception {
 
         public InvalidPhoneNumberException(String errorMessage) {
             super(errorMessage);
@@ -58,6 +115,11 @@ public class Person implements Serializable {
 
     }
 
+    /**
+     * Overridden toString method to be Return the name in Format "Firstname Name".
+     *
+     * @return Returning the Name in format "Firstname Name" as String
+     */
     @Override
     public String toString() {
         return firstName + " " + name;

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Place.java

@@ -1,36 +1,78 @@
 package ch.zhaw.projekt2.turnierverwaltung;
 
 import java.io.Serializable;
+import java.util.logging.Logger;
 
+/**
+ * Class Representing a place that can be set for a game
+ */
 public class Place implements Serializable {
     private final String NAME_MATCHING_REGEX = "[a-zA-Z0-9]{1,20}";
     private String name;
 
+    private static final Logger logger = Logger.getLogger(FileIO.class.getCanonicalName());
+
+    /**
+     * Constructor of a place initializes it and checks if name is in valid format
+     *
+     * @param name to be set
+     * @throws InvalidNameException If name is invalid
+     */
     public Place(String name) throws InvalidNameException {
         if (!name.matches(NAME_MATCHING_REGEX)) {
-            throw new InvalidNameException("The Name is Invalid.");
+            logger.warning("Name: " + name + " does not follow the valid format");
+            throw new InvalidNameException("The Name: " + name + " is in an invalid Format");
         }
+        logger.fine("Name: " + name + " is valid and will be set for the Place");
         setName(name);
     }
 
+    /**
+     * Method to get the Name of the Place as String
+     *
+     * @return name of place as String
+     */
     public String getName() {
+        logger.finer("returning the name: " + name);
         return name;
     }
 
-    public void setName(String name) {
+    /**
+     * Method to set the name of a place
+     *
+     * @param name the name to be set
+     */
+    private void setName(String name) {
+        logger.finer("Setting " + name + " as name of place");
         this.name = name;
     }
 
+    /**
+     * Override of toString to return the name as String when needed
+     *
+     * @return the name of the place as String
+     */
     @Override
     public String toString() {
         return name;
     }
 
+    /**
+     * Override of equals tom compare places with each other
+     *
+     * @param place to be compared with this instance
+     * @return true if equals and false if not equal
+     */
     public boolean equals(Place place) {
+        logger.fine("Comparing " + place + " with " + this);
         return name.equals(place.getName());
     }
 
+    /**
+     *  Functionality to save more details than the name about a place is not implemented in this prototype,
+     *  so no functionality is set yet to change the place.
+     * @param place to be changed
+     */
     public void change(Place place) {
-        //TODO: If Place gets more developed in future releases
     }
 }

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Player.java

@@ -1,69 +1,127 @@
 package ch.zhaw.projekt2.turnierverwaltung;
 
-import java.text.DateFormat;
-import java.text.SimpleDateFormat;
+
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
+import java.util.logging.Logger;
 
+/**
+ * Class Representing a single Player
+ */
 public class Player extends Person implements Participant {
 
     private LocalDate dateOfBirth;
 
+    private static final Logger logger = Logger.getLogger(FileIO.class.getCanonicalName());
+
+    /**
+     * Constructor of player initializes a new player setting sever attributes like firstname, name birthdate usw.
+     * and checking if the format is valid
+     *
+     * @param firstName   the firstname of the player
+     * @param name        the name of the player
+     * @param phoneNumber the phone number of the player
+     * @param dateOfBirth the birthdate of the player
+     * @throws InvalidNameException        thrown when the name or firstname are not in a valid format
+     * @throws InvalidPhoneNumberException thrown when the phone number is not in a valid format
+     */
     public Player(String firstName, String name, String phoneNumber, String dateOfBirth) throws InvalidNameException, InvalidPhoneNumberException, InvalidDateException {
+
         super(firstName, name, phoneNumber);
+        logger.fine("initialized super of Player with firstname, name and phone number");
+        logger.finer("Setting the date of birth as:" + dateOfBirth);
         setDateOfBirth(dateOfBirth);
+        logger.finer("finished initializing the Player:" + name);
     }
 
+    /**
+     * Method to get the birthday of a player
+     *
+     * @return the birthday of a player
+     */
     public LocalDate getDateOfBirth() {
+        logger.fine("returning the birthday of " + getName());
         return dateOfBirth;
     }
 
-    public String getFormatedDateOfBirth(){
+    /**
+     * Method that returns the date of birth formatted in eu way dd.MM.YYYY and as String
+     *
+     * @return String of formatted date
+     */
+    public String getFormattedDateOfBirth() {
+        logger.finer("Trying to get the formatted date");
         try {
             DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
+            logger.fine("Returning the formatted birthdate of player: " + getName());
             return dateOfBirth.format(formatter);
         } catch (Exception e) {
-           //todo handle and logging
+            logger.warning("Failed to get formatted date for player " + getName() + "Error: " + e);
+            //TODO handle
             return "";
         }
     }
 
+
+    /**
+     * Method to set the date of Birth with a String provided.
+     *
+     * @param dateOfBirth to be as a String
+     */
     public void setDateOfBirth(String dateOfBirth) throws InvalidDateException {
+        logger.finer("Trying to set of birth with the String " + dateOfBirth + " provided");
         if (dateOfBirth.length() > 0) {
             String[] date = dateOfBirth.split("\\.");
             try {
-                this.dateOfBirth = LocalDate.of(Integer.valueOf(date[2]), Integer.valueOf(date[1]), Integer.valueOf(date[0]));
+                this.dateOfBirth = LocalDate.of(Integer.parseInt(date[2]), Integer.parseInt(date[1]), Integer.parseInt(date[0]));
+                logger.fine("Date of birth of" + getName() + " has been set to " + dateOfBirth);
             } catch (NumberFormatException | IndexOutOfBoundsException e) {
                 e.printStackTrace();
+                logger.warning("Date of birth of " + getName() + " could not be set, leaving at null");
                 throw new InvalidDateException("Date invalid");
             }
-
         } else {
-            dateOfBirth = null;
+            logger.warning("Date of birth of " + getName() + " could not be set, leaving at null");
         }
     }
 
+    /**
+     * Method that sets date of Birth with a LocalDate provided
+     *
+     * @param dateOfBirth parameter given as LocalDate
+     */
     public void setDateOfBirth(LocalDate dateOfBirth) {
+        logger.fine("Setting date of birth of" + getName() + "with provided LocalDate: " + dateOfBirth);
         this.dateOfBirth = dateOfBirth;
     }
 
+    /**
+     * Override of equals method to compare participants against each other
+     *
+     * @param participant to be compared with this instance
+     * @return true if equals, false if not
+     */
     @Override
     public boolean equals(Participant participant) {
-        return getClass().equals(participant.getClass()) && toString().toLowerCase().equals(participant.toString().toLowerCase());
+        logger.fine("Comparing " + participant + " with " + this);
+        return getClass().equals(participant.getClass()) && toString().equalsIgnoreCase(participant.toString());
     }
 
+    /**
+     * Override of the change method to change a Participant with a new one
+     *
+     * @param participant the new participant to be added
+     */
     @Override
-    public void change(Participant participant) {
+    public void change(Participant participant) throws InvalidPhoneNumberException {
+        logger.fine("changing the current Player " + this + "with " + participant.getName());
         Player player = (Player) participant;
+
         setDateOfBirth(player.getDateOfBirth());
         setPhoneNumber(player.getPhoneNumber());
     }
 
-    public class InvalidDateException extends Exception {
-        public InvalidDateException() {
-            super();
-        }
-
+    public static class InvalidDateException extends Exception {
         public InvalidDateException(String errorMessage) {
             super(errorMessage);
         }

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Team.java

@@ -2,57 +2,127 @@ package ch.zhaw.projekt2.turnierverwaltung;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.logging.Logger;
 
+
+/**
+ * Class Team represents a team that can be added to a tournament
+ * (in the prototype there is no functionality for the team)
+ */
 public class Team implements Participant {
     private String name;
     private List<Player> players;
     private Person contactPerson;
 
+    private static final Logger logger = Logger.getLogger(FileIO.class.getCanonicalName());
+
+    /**
+     * Constructor to initiate a team, sets its name
+     *
+     * @param name the new name to be set
+     */
     public Team(String name) {
+        logger.fine("Setting the new  name of the team as: " + name);
         setName(name);
         players = new ArrayList<>();
     }
 
+    /**
+     * Method to add a new player to a team
+     *
+     * @param player new player to be added to a team
+     */
     public void addPlayer(Player player) {
+        logger.fine("Adding new Player named: " + player + "into the team");
         players.add(player);
     }
 
+    /**
+     * Method to return the name of the team
+     *
+     * @return the name of the team
+     */
     @Override
     public String getName() {
+        logger.fine("Returning the name of the team:" + name);
         return name;
     }
 
+    /**
+     * Method to set the name of a team
+     *
+     * @param name of the team
+     */
     @Override
     public void setName(String name) {
         this.name = name;
     }
 
+    /**
+     * Method that sets a complete List of all players as players of the team
+     *
+     * @param players List of Players to be set
+     */
     public void setPlayers(List<Player> players) {
+        logger.fine("Inserts Player");
         this.players = players;
     }
 
+    /**
+     * Method to get the List of all Players in a team
+     *
+     * @return List of all players in team
+     */
     public List<Player> getPlayers() {
+        logger.fine("Returning List of all players in " + getName());
         return players;
     }
 
+    /**
+     * Override of equals Method to compare teams with each other
+     *
+     * @param participant to be compared with this instance
+     * @return true if teams are the same false if not.
+     */
     @Override
     public boolean equals(Participant participant) {
-        return getClass().equals(participant.getClass()) && toString().toLowerCase().equals(participant.toString().toLowerCase());
+        return getClass().equals(participant.getClass()) && toString().equalsIgnoreCase(participant.toString());
     }
 
+    /**
+     * Functionality to save a team is not implemented in this prototype, so no functionality is set yet to change the team
+     *
+     * @param participant date object containing new data
+     */
     @Override
     public void change(Participant participant) {
-        return;
     }
 
+    /**
+     * Method to get the current contact person of a team
+     *
+     * @return the current contact person
+     */
     public Person getContactPerson() {
+        logger.fine("Returning contact Person of team " + getName());
         return contactPerson;
     }
 
+    /**
+     * Method to set a Person as a contact person of a team
+     *
+     * @param contactPerson to be set
+     */
     public void setContactPerson(Person contactPerson) {
+        logger.fine("Setting " + contactPerson + " as a contact Person for team " + getName());
         this.contactPerson = contactPerson;
     }
 
+    /**
+     * Override of toString method, that returns the current name
+     *
+     * @return name in form of a String
+     */
     @Override
     public String toString() {
         return name;

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Tournament.java

@@ -59,7 +59,7 @@ public class Tournament implements Serializable {
      *
      * @param newParticipant the Participant to be saved or edited
      */
-    public void saveParticipant(Participant newParticipant) {
+    public void saveParticipant(Participant newParticipant) throws Person.InvalidPhoneNumberException {
         logger.fine("Trying to add " + newParticipant + " into the tournament");
         for (Participant participant : participants) {
             if (participant.equals(newParticipant)) {
@@ -76,8 +76,8 @@ public class Tournament implements Serializable {
     /**
      * Method to remove an existing participant throws error if participant could not be found
      *
-     * @param participant
-     * @throws ParticipantNotExistsException
+     * @param participant to be removed
+     * @throws ParticipantNotExistsException thrown when the participant could not be found
      */
     public void removeParticipant(Participant participant) throws ParticipantNotExistsException {
         logger.finer("Trying to remove " + participant + " from participants List");
@@ -120,8 +120,9 @@ public class Tournament implements Serializable {
     }
 
     /**
-     * @param place
-     * @throws PlaceNotExistsException
+     * Method that removes a place from the List, also checks if place is in the list
+     * @param place to be removed
+     * @throws PlaceNotExistsException thrown when the place could not be found
      */
     public void removePlace(Place place) throws PlaceNotExistsException {
         if (!places.contains(place)) {
@@ -156,8 +157,6 @@ public class Tournament implements Serializable {
                 logger.warning("Invalid number of participants only participants 2^n allowed");
                 throw new NumberOfParticipantInvalidException("Can not Create Game Schedule for KO Modus");
             }
-
-
         } else {
             logger.warning("In the prototype the only accessible game schedule is the ko modus");
         }
@@ -230,7 +229,7 @@ public class Tournament implements Serializable {
     /**
      * Setter Method to set the type of the tournament
      *
-     * @param type
+     * @param type the type to be set
      */
     public void setType(Type type) {
         logger.fine("Setting the type of the tournament to: " + type);
@@ -254,17 +253,26 @@ public class Tournament implements Serializable {
     public enum Type {
         KO("KO-System"); //GROUPS("Gruppenspiele"); //Type GROUPS is not implemented in this prototype.
 
-        private String name;
+        private final String name;
 
-        private Type(String name) {
+        Type(String name) {
             this.name = name;
         }
 
+        /**
+         * Overridden toString method to return the name
+         * @return the name of the type
+         */
         @Override
         public String toString() {
             return name;
         }
 
+        /**
+         * Method to return an Observable List containing all types
+         *
+         * @return the Observable list with all types
+         */
         public static ObservableList<Type> getObservableList() {
             ObservableList<Type> items = FXCollections.observableArrayList();
             items.addAll(values());
@@ -275,11 +283,7 @@ public class Tournament implements Serializable {
     /**
      * Custom exception thrown when an invalid file is chosen
      */
-    public class InvalidTypeException extends Exception {
-        public InvalidTypeException() {
-            super();
-        }
-
+    public static class InvalidTypeException extends Exception {
         public InvalidTypeException(String errorMessage) {
             super(errorMessage);
         }
@@ -287,13 +291,9 @@ public class Tournament implements Serializable {
     }
 
     /**
-     * Custom Expeption thrown when a Participant does not exist
+     * Custom Exception thrown when a Participant does not exist
      */
-    public class ParticipantNotExistsException extends Exception {
-        public ParticipantNotExistsException() {
-            super();
-        }
-
+    public static class ParticipantNotExistsException extends Exception {
         public ParticipantNotExistsException(String errorMessage) {
             super(errorMessage);
         }
@@ -303,11 +303,7 @@ public class Tournament implements Serializable {
     /**
      * Custom Exception thrown when a Place does not exist
      */
-    public class PlaceNotExistsException extends Exception {
-        public PlaceNotExistsException() {
-            super();
-        }
-
+    public static class PlaceNotExistsException extends Exception {
         public PlaceNotExistsException(String errorMessage) {
             super(errorMessage);
         }
@@ -317,11 +313,7 @@ public class Tournament implements Serializable {
     /**
      * Custom Exception thrown when the number of participants is not valid
      */
-    public class NumberOfParticipantInvalidException extends Exception {
-        public NumberOfParticipantInvalidException() {
-            super();
-        }
-
+    public static class NumberOfParticipantInvalidException extends Exception {
         public NumberOfParticipantInvalidException(String msg) {
             super(msg);
         }

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/TournamentDecorator.java

@@ -85,7 +85,7 @@ public class TournamentDecorator implements IsObservable{
         } catch (Tournament.InvalidTypeException e) {
             e.printStackTrace();
             //TODO: Logger
-            factoryDecorator.printMessageToFooter("Turniermodus nicht möglich",true);
+            factoryDecorator.printMessageToFooter("Turniermodus nicht moeglich",true);
 
         } catch (IOException e) {
             e.printStackTrace();
@@ -113,7 +113,7 @@ public class TournamentDecorator implements IsObservable{
             factoryDecorator.clearMessage(true);
         } catch (Tournament.NumberOfParticipantInvalidException e) {
             e.printStackTrace();
-            factoryDecorator.printMessageToFooter("Anzahl Teilnehmer nicht vielfaches von 2",true);
+            factoryDecorator.printMessageToFooter("Anzahl Teilnehmer muss mindestens 4 betragen und eine Potenz von 2 sein.",true);
         }
         informListener();
     }
@@ -131,7 +131,7 @@ public class TournamentDecorator implements IsObservable{
             factoryDecorator.printMessageToFooter("Invalide Telefonnummer",true);
         } catch (Player.InvalidDateException e) {
             e.printStackTrace();
-            factoryDecorator.printMessageToFooter("Ungültiges Geburtsdatum", true);
+            factoryDecorator.printMessageToFooter("Ungueltiges Geburtsdatum", true);
         }
     }
 

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/gameScheduleView/AlertNewSchedule.java

@@ -0,0 +1,26 @@
+package ch.zhaw.projekt2.turnierverwaltung.main.gameScheduleView;
+
+import javafx.scene.control.Alert;
+import javafx.scene.control.ButtonBar;
+import javafx.scene.control.ButtonType;
+
+public class AlertNewSchedule extends Alert {
+    private ButtonType yesButton = new ButtonType("Ja", ButtonBar.ButtonData.YES);
+    private ButtonType noButton = new ButtonType("Nein", ButtonBar.ButtonData.NO);
+    private boolean result;
+
+    public AlertNewSchedule() {
+        super(AlertType.WARNING);
+        setTitle("Neu erstellen");
+        setHeaderText("Spielplan neu erstellen?");
+        setContentText("Sind Sie sicher, dass Sie den Spielplan neu erstellen moechten?\nAlle Spielfortschritte gehen daraufhin verloren!");
+        getButtonTypes().setAll(yesButton,noButton);
+    }
+
+    public boolean showAndGetResult() {
+        showAndWait().ifPresent(input -> {
+            result = input == yesButton;
+        });
+        return result;
+    }
+}

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/gameScheduleView/GameScheduleController.java

@@ -39,8 +39,15 @@ public class GameScheduleController extends FXController {
 
     @FXML
     void createNewSchedule(ActionEvent event) {
+        if (getTournamentDecorator().getTournament().getGameList().size() > 0) {
+            AlertNewSchedule alert = new AlertNewSchedule();
+            if (alert.showAndGetResult()) {
                 getTournamentDecorator().createNewGameSchedule();
             }
+        } else {
+            getTournamentDecorator().createNewGameSchedule();
+        }
+    }
 
     @FXML
     void openPlacesFormular(ActionEvent event) {

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/participantAddFormular/ParticipantFormularController.java

@@ -87,7 +87,7 @@ public class ParticipantFormularController extends FXController {
         participantNameTextField.setText(participant.getName());
         firstNameTextField.setText(participant.getFirstName());
         phoneNumberTextField.setText(participant.getPhoneNumber());
-        birthDateTextField.setText(participant.getFormatedDateOfBirth());
+        birthDateTextField.setText(participant.getFormattedDateOfBirth());
     }
 
     @FXML

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/tournamentList/AlertDelete.java

@@ -21,9 +21,7 @@ public class AlertDelete extends Alert {
     public boolean showAndGetResult() {
         result = false;
         showAndWait().ifPresent(type -> {
-            if (type == yesButton) {
-                result = true;
-            }
+            result = type == yesButton;
         });
         return result;
     }