大家下午好。我通常会尝试自己发现并纠正错误，但是这次我陷入了困境。我的任务是写一个贷款计算器。所有代码都可以正常工作和编译，直到我需要创建一个折线图/图，该图会在新窗口中弹出。问题出在加载FXML文件或将附加控制器连接到主控制器上。我尝试了不同的方法，并在不同的论坛中检查了解决方案，但是无法在我的代码中实现。谁能为我提出解决方案？
这是启动程序的我的主程序。
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("Scene.fxml"));
primaryStage.setTitle("Loan calculator");
primaryStage.setScene(new Scene(root, 770, 410));
primaryStage.setResizable(false);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
这是我的主控制器。 小笔记。我知道我在主控制器中使用第二个控制器的“初始化”方法的方法不正确，但是我尝试了不同的方法，但它们并没有给我带来更好的结果
public class Controller implements Initializable {
public static int years = 0;
public static int months = 0;
private double desiredLoan = 1; //should be set to zero,but for testing is set differently
private boolean graph = true; //true - linear, false - annuity
@FXML
private Button Button_3 = new Button();
private LineGraphController lineGraphController = new LineGraphController("Linear");
private AnnuityGraphController annuityGraphController = new AnnuityGraphController("Annuity");
/**Some code to count my data*/
@Override /** This method is used to access my UI elements and access other controllers*/
public void initialize(URL url, ResourceBundle resourceBundle) {
Button_3.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent actionEvent) {
try {
if (desiredLoan == 0 && months == 0 && years == 0) {
throw new RuntimeException();
}
else {
if (whatGraph() == true) { //make linear graph
lineGraphController.initialize(url, resourceBundle);
}
else {//make annuity graph
annuityGraphController.initialize(url, resourceBundle);
}
}
}
catch (RuntimeException error) {
error.printStackTrace();
}
}
});
}
/** Getters and setters */
public boolean whatGraph() {
return graph;
}
public void setGraph(boolean graph) {
this.graph = graph;
}
}
我的主要控制器：线图控制器
/** This controller is used to load additional fxml file*/
public class LineGraphController implements Initializable {
@FXML
public LineChart<?, ?> LineGraph;
private String title;
public LineGraphController(String title) {
this.title = title;
}
@Override
public void initialize(URL url, ResourceBundle resourceBundle) {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("LineGraph.fxml"));
Parent lineGraph = null;
try {
lineGraph = (Parent)fxmlLoader.load();
} catch (IOException e) {
e.printStackTrace();
}
Stage window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle(title);
window.setResizable(false);
window.setMinWidth(600);
window.setMinHeight(400);
window.setScene(new Scene(lineGraph));
window.showAndWait();
}
}
环形图控制器
/** This controller is used to load additional fxml file*/
public class AnnuityGraphController implements Initializable {
@FXML
public LineChart<?, ?> AnnuityGraph;
private String title;
public AnnuityGraphController(String title) {
this.title = title;
}
@Override
public void initialize(URL url, ResourceBundle resourceBundle) {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AnnuityGraph.fxml"));
Parent lineGraph = null;
try {
lineGraph = (Parent)fxmlLoader.load();
} catch (IOException e) {
e.printStackTrace();
}
Stage window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle(title);
window.setResizable(false);
window.setMinWidth(600);
window.setMinHeight(400);
window.setScene(new Scene(lineGraph));
window.showAndWait();
}
}
我的主要FXML文件。
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" style="-fx-background-color: #4a4a4a;" xmlns="http://javafx.com/javafx/10.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Paskolu_Skaiciuokle.Controller">
<center>
<Button fx:id="Button_3" maxWidth="150.0" mnemonicParsing="false" prefHeight="26.0" prefWidth="100.0" style="-fx-effect: dropshadow(gaussian, rgba(0, 0, 0, 0.3), 3, 0,5, 5, 5);" text="Show graph" BorderPane.alignment="CENTER">
<font>
<Font name="Times New Roman" size="12.0" />
</font>
</Button>
</center>
</BorderPane>
我为控制器添加的其他FXML文件：折线图FXML
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="670.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/10.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Loan_calculator.LineGraphController">
<!-- some code -->
</AnchorPane>
环形图FXML
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="670.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/10.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Loan_calculator.AnnuityGraphController">
<-- some code -->
</AnchorPane>
谢谢您的帮助。ps。这些是我尝试寻找解决方案的链接，有很多不同的方法可以对此进行编码，但是找不到我可以实现到我的代码中的方法。或者也许我只是不知道该怎么做它。无论哪种方式，我都希望有人能够为我提供帮助，或者说明如何解决此问题。链接：•Passing Parameters JavaFX FXML•How to create multiple javafx controllers with different fxml files?•Multiple FXML with Controllers, share object 我的主要问题是从我的主控制器访问其他控制器。 （所有控制器都链接到它们自己的FXML文件）。
我不太了解您的问题，但我会尽力回答。我认为您想从主控制器访问其他控制器，最简单的方法是：
FXMLLoader mainLoader = new FXMLLoader(getClass().getResource("MainController.fxml"));
Parent main = mainLoader.load();
MainController mainController = mainLoader.getController();
FXMLLoader otherLoader = new FXMLLoader(getClass().getResource("OtherController.fxml"));
Parent other = otherLoader.load();
// set other controller in main controller
mainController.setOtherController(otherLoader.getController());
如果使用javafx-weaver和弹簧靴，DI将使之更加容易：
@Component
@FxmlView
class MainController {
@Autowired
private FxControllerAndView<OtherController, VBox> otherControllerAndView;
// otherControllerAndView.getController() to access other controller
}