在JavaFX中存储来自TextFields和ComboBox的输入？

Question

我正在制作一个基本的电影出租模拟器应用程序，我目前有一个问题，存储输入从我的文本字段和我的组合框到变量。我设法将大多数变量转换为字符串，但是当我试图打印输出以测试它时，它总是返回“null”。

我需要弄清楚如何从组合框中获取用户所做的选择并将其存储为字符串，我还需要弄清楚如何正确存储方法的结果。我以前从来没有遇到过这个问题，所以我真的不知道如何解决它。我的代码如下：

公共类RentGameDialogController扩展RentalStoreGuicController实现可初始化{

/** TextField Objects **/
@FXML private TextField nameField, rentedOnField, dueBackField;

/** String for NameField **/
String name, rentedOn, dueBack;

/** Game ComboBox ID's **/
@FXML private ObservableList<GameType> cbGameOptions;
@FXML private ComboBox<GameType> cbGame;

/** Console ComboBox ID's **/
@FXML private ObservableList<PlayerType> cbConsoleOptions;
@FXML private ComboBox<PlayerType> cbConsole;

/** GameType object **/
private GameType game;

/** PlayerType Object **/
private PlayerType console;

/** Button ID's **/
@FXML Button cancel, addToCart;

/** Counter for calculating total **/
int gameCounter;

/** Stage for closing GUI **/
private Stage currentStage;




@Override
public void initialize(URL location, ResourceBundle resources) {

    /** Select Console **/
    cbConsoleOptions = FXCollections.observableArrayList();
    for (PlayerType p : PlayerType.values()) { cbConsoleOptions.addAll(p); }
    cbConsole.getItems().addAll(cbConsoleOptions);

    /** Select Game **/
    cbGameOptions = FXCollections.observableArrayList();
    for (GameType g : GameType.values()){ cbGameOptions.addAll(g); }
    cbGame.getItems().addAll(cbGameOptions);

}

public String getName(){
    name = nameField.getText();

    try {

        String[] firstLast = name.split(" ");
        String firstName = firstLast[0];
        String lastName = firstLast[1];

    } catch (Exception e){
        e.printStackTrace();
    }

    return name;
}

public void getGame() {
    GameType gameChoice = cbGame.getSelectionModel().getSelectedItem();
}

public void getConsole() {
    PlayerType player = cbConsole.getSelectionModel().getSelectedItem();
}

public String getRentedOn() throws ParseException {

    rentedOn = rentedOnField.getText();


    DateFormat format = new SimpleDateFormat("dd/MM/yyyy");
    Date rentedOnDate = format.parse(rentedOn);

    Calendar cal = Calendar.getInstance();
    cal.setLenient(false);
    cal.setTime(rentedOnDate);

    try {

        cal.getTime();

    } catch (Exception e) {
        System.exit(0);
    }

    return rentedOn;

}

public String getDueBack() throws ParseException {

    dueBack = dueBackField.getText();


    DateFormat format = new SimpleDateFormat("dd/MM/yyyy");
    Date dueBackDate = format.parse(dueBack);

    Calendar cal = Calendar.getInstance();
    cal.setLenient(false);
    cal.setTime(dueBackDate);

    try {

        cal.getTime();

    } catch (Exception e) {
        System.exit(0);
    }

    return dueBack;

}

/*************************************
 * This is the method to call the other
 * String methods so their output can be
 * put into my main GUI
 *
 * Current problem: game.toString() and console.toString() throw an InvocationTargetException
 * @return
 * @throws ParseException
 *************************************/

public String storePurchaseData() throws ParseException {
    gameCounter++;                    //Problem               //Problem
    String toList = getName() + " " + game.toString() + " " + console.toString() + " " +
            getRentedOn() + " " + getDueBack();

    return toList; //Returns "null null null"
}


@FXML
public void handleCancelButtonAction (ActionEvent event) {
    currentStage = (Stage) cancel.getScene().getWindow();
    currentStage.close();
}

@FXML
public void addToCartButton (ActionEvent event) throws ParseException {
    System.out.println(storePurchaseData());
    currentStage = (Stage) cancel.getScene().getWindow();
    currentStage.close();
}}

public enum PlayerType {
Xbox360("Xbox 360"),
PS4("Playstation 4"),
XBoxOne("Xbox One"),
WiiU("Wii - U"),
PS3("Playstation 3"),
Wii("Nintendo Wii");

private String console;

PlayerType(String console) { this.console = console; }

public String PlayerType() { return console; }

@Override public String toString() { return console; }}

配子类型：

public enum GameType {
THE_WITCHER("The Witcher 3"),
CALL_OF_DUTY_AW("Call of Duty: Advanced Warfare"),
CALL_DUTY_BLOP3("Call of Duty: Black Ops 3"),
CALL_OF_DUTY_IW("Call of Duty: Infinite Warfare"),
THE_ELDER_SCROLLS("The Elder Scrolls IV: Skyrim");

private String game;

GameType(String game) {
    this.game = game;
}

public String GameType() { return game; }

@Override public String toString() { return game; }}

Answer 1

返回所选值的唯一方法是getname()

您正在使用的其余方法不返回任何内容

public void getGame()  //Void return type
{
    GameType gameChoice = cbGame.getSelectionModel().getSelectedItem();
}

所做的就是创建一个gametype对象，该对象只能在该方法内部访问。

public GameType getGame() //Instead of void, the type you are trying to get
{
    return cbGame.getSelectionModel().getSelectedItem();
}

GameType selectedGame = getGame();

public String getGame()
{
    return cbGame.getSelectionModel().getSelectedItem().toString();
}