我的代码存在问题我正在为考试项目写作。它在JavaFX中。 我将一些参数从我的模型发送到我的主，然后再从主模块发送到控制器。即使位置集应该正确，我也会收到LoadException。 这是错误代码：
javafx.fxml.LoadException： 生物/ grpro_project /目标/类/项目/视图/ reservation.fxml
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2595)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2565)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2435)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2403)
at project.ReservationMain.showReservationView(ReservationMain.java:22)
at project.ReservationMain.start(ReservationMain.java:37)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(LauncherImpl.java:821)
at com.sun.javafx.application.LauncherImpl$$Lambda$50/272422922.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/2050891229.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
at com.sun.javafx.application.PlatformImpl$$Lambda$48/1063369253.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/1170609517.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$38/1399457240.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2560)
... 18 more
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at project.controller.ReservationController.initialize(ReservationController.java:166)
... 28 more
这是主要课程： 公共类ReservationMain扩展了Application {
public void showReservationView(Stage stage, String showtitle, String showdate, String showtime) {
try {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(getClass().getResource("view/reservation.fxml"));
Parent reservationView = loader.load();
ReservationController controller = loader.<ReservationController>getController();
controller.setup(showtitle, showdate, showtime);
stage.setTitle("Reservation");
stage.setScene(new Scene(reservationView, 800, 600));
stage.show();
} catch (IOException e) {
e.printStackTrace(); //Show a dialog or something... ?
}
}
@Override
public void start(Stage primaryStage) throws Exception {
showReservationView(primaryStage, "", "", "");
}
public static void main(String[] args) {
launch(args);
}
}
这是用于将参数发送到main的模型中的方法：
reservationButton.setOnAction((event) -> {
System.out.println(showtime + showdate + showtime);
ReservationMain newscene = new ReservationMain();
Stage stage = new Stage();
newscene.showReservationView(stage, showtitle, showdate, showtime);
});
希望有人可以提供帮助 - 我现在已经尝试解决这个问题很长时间了。
控制器代码（从模型类获取数据，但不应该是一个问题）：
public class ReservationController {
private Reservation reservation = new Reservation();
private DatabaseLoad databaseLoad = new DatabaseLoad();
private DatabaseInsert databaseInsert = new DatabaseInsert();
private int theater;
private ObservableList numberOfSeatsSelectedItems = FXCollections.observableArrayList();
private int numberOfSeatsToSelect = 1;
private int selectedRow;
private int selectedSeat;
private int showID;
@FXML
private TextField nameField;
@FXML
private TextField phoneField;
@FXML
private GridPane seatsGridContainer;
@FXML
private VBox movieScreenBox;
@FXML
private Text theaterNumber;
@FXML
private Text freeSeats;
@FXML
private ComboBox seatsSelectedBox;
@FXML
private Button reserveButton;
@FXML
private Text movieTitleText;
@FXML
private Text movieDateText;
@FXML
private Text movieTimeText;
public ReservationController() {
}
public void setup(String showtitle, String showdate, String showtime){
showID = reservation.loadTheatertoShow(showtitle, showdate, showtime);
reservation.loadTheaterFromDatabase(showID);
theater = reservation.getTheaterNumber();
numberOfSeatsSelectedItems.addAll(1,2,3,4,5,6,7,8);
}
@FXML
public void initialize() {
//int numberOfSeatsSelected;
seatsSelectedBox.setItems(numberOfSeatsSelectedItems);
seatsSelectedBox.setOnAction((event) -> {
numberOfSeatsToSelect = (int) seatsSelectedBox.getSelectionModel().getSelectedItem();
});
movieScreenBox.setBackground(new Background(new BackgroundFill(Color.GRAY, CornerRadii.EMPTY, Insets.EMPTY)));
seatsGridContainer.setHgap(8);
seatsGridContainer.setVgap(8);
seatsGridContainer.setAlignment(Pos.CENTER);
ArrayList occupiedSeats = reservation.loadOccupiedSeats(showID);
Seat[][] seat = new Seat[reservation.getNumberOfRows()][reservation.getNumberOfSeatsInARow()];
for (int row = 0; row < seat.length; row++) {
for (int seatNumber = 0; seatNumber < seat[0].length; seatNumber++) {
seat[row][seatNumber] = new Seat("");
seat[row][seatNumber].setPrefSize(30, 30);
//
final int finalRow = row;
final int finalSeatNumber = seatNumber;
seat[row][seatNumber].setOnMouseClicked(arg0 -> {
selectedRow = finalRow;
selectedSeat = finalSeatNumber;
for (int i = 0; i < seat.length; i++) {
for (int j = 0; j < seat[0].length; j++) {
if (seat[i][j].isFree()) {
seat[i][j].setStyle("-fx-background-color: green;");
seat[i][j].setSelected(false);
}
}
}
// check: does the seat selection extend the boundaries of the theater or go into already booked seats?
if(seat[finalRow].length <= finalSeatNumber-1 + numberOfSeatsToSelect) {
int seatsLeft = seat[finalRow].length - finalSeatNumber;
seatsSelectedBox.setValue(seatsLeft);
for(int i = 0 ; i < seatsLeft ; i++) {
seat[finalRow][finalSeatNumber + i].setStyle("-fx-background-color: dodgerblue;");
}
}
else {
for(int i = 0 ; i < numberOfSeatsToSelect ; i++) {
if(!seat[finalRow][finalSeatNumber + i].isFree()) {
seatsSelectedBox.setValue(i);
break;
}
seat[finalRow][finalSeatNumber + i].setStyle("-fx-background-color: dodgerblue;");
seat[finalRow][finalSeatNumber + i].setSelected(true);
}
}
});
// checks and sets which seats are booked
if(occupiedSeats.contains("" + row + seatNumber)) {
seat[row][seatNumber].setIsFree(false);
}
//set free seats to change the cursor on mouseover
if (seat[row][seatNumber].isFree()) {
seat[row][seatNumber].setStyle("-fx-background-color: green;");
seat[row][seatNumber].setOnMouseEntered(me -> seatsGridContainer.setCursor(Cursor.HAND));
seat[row][seatNumber].setOnMouseExited(me -> seatsGridContainer.setCursor(Cursor.DEFAULT));
}
// set booked seats to display as red
else {
seat[row][seatNumber].setStyle("-fx-background-color: red;");
seat[row][seatNumber].setDisable(true);
}
seatsGridContainer.add(seat[row][seatNumber], seatNumber, row);
}
}
reserveButton.setOnAction((event) -> {
databaseInsert.newPersonInDatabase(nameField.getText(),phoneField.getText());
ArrayList nextPersonIDs = databaseLoad.getFromDatabase(
"SELECT * FROM person WHERE PhoneNumber=" + phoneField.getText(),"person")[2];
int nextPersonID = (int) nextPersonIDs.get(nextPersonIDs.size() - 1);
ArrayList arr = databaseLoad.getFromDatabase("SELECT * FROM reservations","reservations")[0];
int nextReservationID = (int) arr.get(arr.size()-1) + 1;
for(int i = 0; i < numberOfSeatsToSelect ; i++) {
databaseInsert.newReservationInDatabase(
nextReservationID, nextPersonID, showID, selectedRow, selectedSeat+i);
}
initialize();
});
ArrayList[] shows = databaseLoad.getFromDatabase("SELECT * FROM shows WHERE ShowID=" + showID, "shows");
movieTitleText.setText("Film: " + shows[0].get(0));
movieDateText.setText("Dato: " + shows[1].get(0).toString());
movieTimeText.setText("Tidspunkt: " + shows[2].get(0).toString());
theaterNumber.setText("Sal nr: " + theater);
freeSeats.setText("Ledige sæder: " + (reservation.getNumberOfSeats()-occupiedSeats.size()));
}
}
如果我尝试将f添加到fxml文件的文件夹（/view/reservation.fxml），则会出现以下错误消息：
Exception in Application start method
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:875)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$147(LauncherImpl.java:157)
at com.sun.javafx.application.LauncherImpl$$Lambda$1/245257410.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Location is not set.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2428)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2403)
at project.ReservationMain.showReservationView(ReservationMain.java:22)
at project.ReservationMain.start(ReservationMain.java:38)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(LauncherImpl.java:821)
at com.sun.javafx.application.LauncherImpl$$Lambda$50/2038127331.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/1716030070.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
at com.sun.javafx.application.PlatformImpl$$Lambda$48/1391275142.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/156840264.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$38/848186220.run(Unknown Source)
... 1 more
使用退出代码1完成处理