使用 FXML 切换场景时出错
Error switching Scenes with FXML
所以我想在两个 FXML 文件之间切换场景，但是如果我尝试启动应用程序，我会收到此错误消息：
Exception in Application start method
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:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
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:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication5(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: Error resolving onAction='#handleButtonAction', either the event handler is not in the Namespace or there is an error in the script.
/C:/Users/j3Ypi/Dropbox/05_Praktikum/survey/out/production/survey/survey/view/moduleA.fxml:28
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access0(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at survey.Main.showModuleA(Main.java:40)
at survey.Main.start(Main.java:24)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication12(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait5(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null3(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater4(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null8(WinApplication.java:191)
... 1 more
Exception running application survey.Main
我尝试了几种方法来加载 FXML 文件，但每次都出现相同的错误。我还尝试了此处社区建议的多种潜在解决方案，但 none 似乎解决了我的问题。他们中的大多数人说这是正确路径的问题，但我在控制器中加载了与主应用程序中完全相同的路径，并且在控制器中没有 handleButtonAction() 应用程序正常启动。我现在在这个基本任务上坚持了几个小时。我使用 IDEA，这是我的代码：
主要：
package survey;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import java.io.IOException;
public class Main extends Application {
private Stage primaryStage;
private BorderPane rootLayout;
@Override
public void start(Stage primaryStage) throws Exception{
this.primaryStage = primaryStage;
this.primaryStage.setTitle("Modul A");
initRootlayout();
showModuleA();
}
private void initRootlayout() throws IOException{
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/rootLayout.fxml"));
rootLayout = loader.load();
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
}
private void showModuleA() throws IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/moduleA.fxml"));
AnchorPane rootPane = loader.load();
rootLayout.setCenter(rootPane);
}
public static void main(String[] args) {
launch(args);
}
}
控制器：
package survey.view;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
public class moduleAController implements Initializable {
@FXML private Button bBack;
@FXML private Button bForward;
@FXML
private void handleButtonAction(ActionEvent event) throws IOException{
Stage stage;
Parent root;
if (event.getSource() == bBack){
stage = (Stage) bBack.getScene().getWindow();
root = FXMLLoader.load(getClass().getResource("view/moduleB.fxml"));
} else {
stage = (Stage) bForward.getScene().getWindow();
root = FXMLLoader.load(getClass().getResource("view/moduleA.fxml"));
}
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
@Override
public void initialize(URL location, ResourceBundle resources) {
}
}
FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.RadioButton?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.control.ToggleGroup?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<AnchorPane fx:id="rootPane" prefHeight="470.0" prefWidth="950.0" styleClass="background" stylesheets="@DarkTheme.css" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="survey.view.moduleAController">
<children>
<BorderPane layoutX="12.0" prefHeight="470.0" prefWidth="950.0">
<top>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="62.0" prefWidth="450.0" BorderPane.alignment="BOTTOM_RIGHT">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button fx:id="bBack" mnemonicParsing="false" onAction="#handleButtonAction" prefHeight="30.0" prefWidth="110.0" text="Zurück" GridPane.columnIndex="1" />
<Button fx:id="bForward" mnemonicParsing="false" onAction="#handleButtonAction" prefHeight="30.0" prefWidth="110.0" text="Vorwärts" GridPane.columnIndex="2" />
<Label fx:id="lModul" text="Modul:" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
</children>
</GridPane>
</top>
<left>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="100.0" BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="126.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="126.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="180.0" minHeight="10.0" prefHeight="104.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="253.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label fx:id="lFrageA" text="1. Frage A" GridPane.halignment="CENTER" GridPane.rowIndex="1" />
<Label fx:id="lFrageB" text="2. Frage B" GridPane.halignment="CENTER" GridPane.rowIndex="2" />
<Label fx:id="lFrageC" text="3. Frage C" GridPane.halignment="CENTER" GridPane.rowIndex="3" />
<Label text="Modul A" GridPane.halignment="CENTER" />
</children>
</GridPane>
</left>
<center>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="189.0" BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<RadioButton fx:id="bCheckA1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="1">
<toggleGroup>
<ToggleGroup fx:id="groupA" />
</toggleGroup>
</RadioButton>
<RadioButton fx:id="bCheckA2" mnemonicParsing="false" toggleGroup="$groupA" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="1" />
<RadioButton fx:id="bCheckB1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="2">
<toggleGroup>
<ToggleGroup fx:id="groupB" />
</toggleGroup></RadioButton>
<RadioButton fx:id="bCheckB2" mnemonicParsing="false" toggleGroup="$groupB" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="2" />
<RadioButton fx:id="bCheckC1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="3">
<toggleGroup>
<ToggleGroup fx:id="groupC" />
</toggleGroup></RadioButton>
<RadioButton fx:id="bCheckC2" mnemonicParsing="false" toggleGroup="$groupC" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="3" />
<Label fx:id="lTrue" text="trifft zu" GridPane.halignment="CENTER" />
<Label fx:id="lFalse" text="trifft nicht zu" GridPane.columnIndex="1" GridPane.halignment="CENTER" />
</children>
</GridPane>
</center>
<bottom>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="62.0" prefWidth="600.0" BorderPane.alignment="BOTTOM_CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button mnemonicParsing="false" prefHeight="30.0" prefWidth="160.0" text="Neue Befragung" GridPane.halignment="CENTER" />
<Button fx:id="bSave" mnemonicParsing="false" prefHeight="30.0" prefWidth="130.0" text="Speichern" GridPane.columnIndex="1" GridPane.halignment="CENTER" />
<Button mnemonicParsing="false" prefHeight="30.0" prefWidth="130.0" text="Auswertung" GridPane.columnIndex="2" GridPane.halignment="CENTER" />
</children>
</GridPane>
</bottom>
<right>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="300.0" BorderPane.alignment="CENTER_RIGHT">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="1" />
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="2" />
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="3" />
<Label text="Kommentar" />
</children>
</GridPane>
</right>
</BorderPane>
</children>
</AnchorPane>
感谢您的帮助。提前致谢！
编辑：
除了动作事件的错误导入之外，路径中也存在错误。控制器位于视图文件夹中，因此路径只是 moduleB.fxml 而不是 view/moduleB.fxml。
感谢您的帮助！
第二个问题的解决方案如下：
root = FXMLLoader.load(getClass().getClassLoader().getResource("xxx/yyy/view/moduleB.fxml)"
其中 xxx 和 yyy 是您的 java 项目的包结构。例如 src/foo/var/view/moduleB.fxml -> "foo/var/view/moduleB.fxml"
为什么你试图在运行时加载它，你需要添加 getClassLoader() 否则你将从控制器获得实际的 class 路径，因为你正在调用 getClass() 控制器中的方法。这就是它找不到您的 fxml 文件的原因。它希望它位于控制器包下的视图包中。我希望它现在有效:)
第一个问题：
您的控制器脚本中出现了一点错误。您导入了错误的 ActionEvent。您导入了
import java.awt.event.ActionEvent;
但需要导入
import javafx.event.ActionEvent;
这应该可以解决问题。
所以我想在两个 FXML 文件之间切换场景，但是如果我尝试启动应用程序，我会收到此错误消息：
Exception in Application start method
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:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
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:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication5(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: Error resolving onAction='#handleButtonAction', either the event handler is not in the Namespace or there is an error in the script.
/C:/Users/j3Ypi/Dropbox/05_Praktikum/survey/out/production/survey/survey/view/moduleA.fxml:28
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access0(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at survey.Main.showModuleA(Main.java:40)
at survey.Main.start(Main.java:24)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication12(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait5(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null3(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater4(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null8(WinApplication.java:191)
... 1 more
Exception running application survey.Main
我尝试了几种方法来加载 FXML 文件，但每次都出现相同的错误。我还尝试了此处社区建议的多种潜在解决方案，但 none 似乎解决了我的问题。他们中的大多数人说这是正确路径的问题，但我在控制器中加载了与主应用程序中完全相同的路径，并且在控制器中没有 handleButtonAction() 应用程序正常启动。我现在在这个基本任务上坚持了几个小时。我使用 IDEA，这是我的代码：
主要：
package survey;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import java.io.IOException;
public class Main extends Application {
private Stage primaryStage;
private BorderPane rootLayout;
@Override
public void start(Stage primaryStage) throws Exception{
this.primaryStage = primaryStage;
this.primaryStage.setTitle("Modul A");
initRootlayout();
showModuleA();
}
private void initRootlayout() throws IOException{
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/rootLayout.fxml"));
rootLayout = loader.load();
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
}
private void showModuleA() throws IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/moduleA.fxml"));
AnchorPane rootPane = loader.load();
rootLayout.setCenter(rootPane);
}
public static void main(String[] args) {
launch(args);
}
}
控制器：
package survey.view;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
public class moduleAController implements Initializable {
@FXML private Button bBack;
@FXML private Button bForward;
@FXML
private void handleButtonAction(ActionEvent event) throws IOException{
Stage stage;
Parent root;
if (event.getSource() == bBack){
stage = (Stage) bBack.getScene().getWindow();
root = FXMLLoader.load(getClass().getResource("view/moduleB.fxml"));
} else {
stage = (Stage) bForward.getScene().getWindow();
root = FXMLLoader.load(getClass().getResource("view/moduleA.fxml"));
}
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
@Override
public void initialize(URL location, ResourceBundle resources) {
}
}
FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.RadioButton?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.control.ToggleGroup?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<AnchorPane fx:id="rootPane" prefHeight="470.0" prefWidth="950.0" styleClass="background" stylesheets="@DarkTheme.css" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="survey.view.moduleAController">
<children>
<BorderPane layoutX="12.0" prefHeight="470.0" prefWidth="950.0">
<top>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="62.0" prefWidth="450.0" BorderPane.alignment="BOTTOM_RIGHT">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button fx:id="bBack" mnemonicParsing="false" onAction="#handleButtonAction" prefHeight="30.0" prefWidth="110.0" text="Zurück" GridPane.columnIndex="1" />
<Button fx:id="bForward" mnemonicParsing="false" onAction="#handleButtonAction" prefHeight="30.0" prefWidth="110.0" text="Vorwärts" GridPane.columnIndex="2" />
<Label fx:id="lModul" text="Modul:" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
</children>
</GridPane>
</top>
<left>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="100.0" BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="126.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="126.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="180.0" minHeight="10.0" prefHeight="104.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="253.0" minHeight="10.0" prefHeight="95.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label fx:id="lFrageA" text="1. Frage A" GridPane.halignment="CENTER" GridPane.rowIndex="1" />
<Label fx:id="lFrageB" text="2. Frage B" GridPane.halignment="CENTER" GridPane.rowIndex="2" />
<Label fx:id="lFrageC" text="3. Frage C" GridPane.halignment="CENTER" GridPane.rowIndex="3" />
<Label text="Modul A" GridPane.halignment="CENTER" />
</children>
</GridPane>
</left>
<center>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="189.0" BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<RadioButton fx:id="bCheckA1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="1">
<toggleGroup>
<ToggleGroup fx:id="groupA" />
</toggleGroup>
</RadioButton>
<RadioButton fx:id="bCheckA2" mnemonicParsing="false" toggleGroup="$groupA" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="1" />
<RadioButton fx:id="bCheckB1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="2">
<toggleGroup>
<ToggleGroup fx:id="groupB" />
</toggleGroup></RadioButton>
<RadioButton fx:id="bCheckB2" mnemonicParsing="false" toggleGroup="$groupB" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="2" />
<RadioButton fx:id="bCheckC1" mnemonicParsing="false" GridPane.halignment="CENTER" GridPane.rowIndex="3">
<toggleGroup>
<ToggleGroup fx:id="groupC" />
</toggleGroup></RadioButton>
<RadioButton fx:id="bCheckC2" mnemonicParsing="false" toggleGroup="$groupC" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="3" />
<Label fx:id="lTrue" text="trifft zu" GridPane.halignment="CENTER" />
<Label fx:id="lFalse" text="trifft nicht zu" GridPane.columnIndex="1" GridPane.halignment="CENTER" />
</children>
</GridPane>
</center>
<bottom>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="62.0" prefWidth="600.0" BorderPane.alignment="BOTTOM_CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button mnemonicParsing="false" prefHeight="30.0" prefWidth="160.0" text="Neue Befragung" GridPane.halignment="CENTER" />
<Button fx:id="bSave" mnemonicParsing="false" prefHeight="30.0" prefWidth="130.0" text="Speichern" GridPane.columnIndex="1" GridPane.halignment="CENTER" />
<Button mnemonicParsing="false" prefHeight="30.0" prefWidth="130.0" text="Auswertung" GridPane.columnIndex="2" GridPane.halignment="CENTER" />
</children>
</GridPane>
</bottom>
<right>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="300.0" BorderPane.alignment="CENTER_RIGHT">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="1" />
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="2" />
<TextArea maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="70.0" prefWidth="250.0" GridPane.rowIndex="3" />
<Label text="Kommentar" />
</children>
</GridPane>
</right>
</BorderPane>
</children>
</AnchorPane>
感谢您的帮助。提前致谢！
编辑： 除了动作事件的错误导入之外，路径中也存在错误。控制器位于视图文件夹中，因此路径只是 moduleB.fxml 而不是 view/moduleB.fxml。
感谢您的帮助！
第二个问题的解决方案如下：
root = FXMLLoader.load(getClass().getClassLoader().getResource("xxx/yyy/view/moduleB.fxml)"
其中 xxx 和 yyy 是您的 java 项目的包结构。例如 src/foo/var/view/moduleB.fxml -> "foo/var/view/moduleB.fxml"
为什么你试图在运行时加载它，你需要添加 getClassLoader() 否则你将从控制器获得实际的 class 路径，因为你正在调用 getClass() 控制器中的方法。这就是它找不到您的 fxml 文件的原因。它希望它位于控制器包下的视图包中。我希望它现在有效:)
第一个问题：
您的控制器脚本中出现了一点错误。您导入了错误的 ActionEvent。您导入了
import java.awt.event.ActionEvent;
但需要导入
import javafx.event.ActionEvent;
这应该可以解决问题。