问题
I am creating a reporting application in which I have 3 scenes with 3 controller classes. My aim is to click on a button (Send Email) from my MaintainanceBacklog_Controller Class, which uses 3 ObservableList from the same controller class and 1 ObservableList from another controller class(BatchProcesses_Controller). I need to pass this one List from BatchProcesses_Controller to my MaintainanceBacklog_Controller. I am getting
Caused by: java.lang.IllegalArgumentException: Can not set reporting.controllers.BatchProcesses_Controller field reporting.controllers.MainScreen_Controller.batchProcesses_Controller to javafx.scene.layout.AnchorPane
I am attaching my code snippets for these three Controller classes + main Class + all three fxml files snippets + Error Stack trace.. Please help. Not able to figure out the issue.
MainScreen_Controller.java
package reporting.controllers;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import reporting.model.BatchProcess_OnlySuccessCount;
import reporting.controllers.BatchProcesses_Controller;
import reporting.controllers.MaintainanceBacklog_Controller;
public class MainScreen_Controller {
@FXML private BatchProcesses_Controller batchProcesses_Controller;
@FXML private MaintainanceBacklog_Controller maintainanceBacklog_Controller;
public void initialize() {
batchProcesses_Controller.init(this);
maintainanceBacklog_Controller.init(this);
}
public ObservableList<BatchProcess_OnlySuccessCount>
getBatchProcessListData() {
return batchProcesses_Controller.data_SuccessCount;
}
}
BatchProcesses_Controller.java
.
.//other @FXML declarations
.
@FXML
private DatePicker datePck_To;
private MainScreen_Controller mainScreen;
@Override
public void initialize(URL location, ResourceBundle resources) {
assert cmbBox_Product != null : "fx:id=\"cmbBox_Product\" was not
injected: check your FXML file 'MaintainanceBacklog_BatchProcesses.fxml'.";
dateCol.setCellValueFactory(new PropertyValueFactory<>("Date"));
...//other column setCellValues here
showGraphCol.setCellValueFactory(new PropertyValueFactory<>
("showGraphBtn"));
}
//injecting main screen controller to this class
public void init(MainScreen_Controller mainScreen_Controller) {
mainScreen = mainScreen_Controller;
}
MaintainanceBacklog_Controller.java
...//other imports
import reporting.util.Maint_ProcessesEnum;
import reporting.controllers.MainScreen_Controller;
public class MaintainanceBacklog_Controller implements Initializable {
...//other FXM`enter code here`L declarations
private MainScreen_Controller main;
@Override
public void initialize(URL location, ResourceBundle resources) {
//other table column setCellValuesFactorys
}
public void onButtonClick_EmailReport() {
EmailGenerator email = new EmailGenerator();
email.setDataInTable(data_after, data_before,data_businessErr,
main.getBatchProcessListData());
}//calling getBatchProcessListData to get the required list
Main.java
public class Main extends Application {private Parent rootNode;
public static void main(String[] args) {
launch(args);
}
@Override
public void init() throws Exception {
FXMLLoader fxmlLoader = new
FXMLLoader(reporting.design.Test.class.getResource("MainScreen.fxml"));
rootNode = fxmlLoader.load();
}
@Override
public void start(Stage stage) throws Exception {
stage.setTitle("RSA Reporting");
stage.setScene(new Scene(rootNode));
stage.show();
}
MainScreen.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="833.0" prefWidth="750.0" xmlns="http://javafx.com/javafx/8.0.141" xmlns:fx="http://javafx.com/fxml/1" fx:controller="reporting.controllers.MainScreen_Controller">
<children>
<TabPane prefHeight="791.0" prefWidth="1046.0">
<tabs>
<Tab text="BatchProcess">
<content>
<fx:include fx:id="batchProcesses_Controller" source="BatchProcesses.fxml" />
</content>
</Tab>
<Tab text="MaintainanceBacklog">
<content>
<fx:include fx:id="maintainanceBacklog_Controller" source="MaintainanceBacklog.fxml" />
</content>
</Tab>
</tabs>
</TabPane>
</children>
</AnchorPane>
BatchProcesses.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.String?>
<?import javafx.collections.FXCollections?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.DatePicker?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Separator?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="batchProcesses" prefHeight="791.0" prefWidth="1046.0" xmlns="http://javafx.com/javafx/8.0.141" xmlns:fx="http://javafx.com/fxml/1" fx:controller="reporting.controllers.BatchProcesses_Controller">
<children>
<Label layoutX="194.0" layoutY="73.0" prefHeight="17.0" prefWidth="82.0" text="Select Process" />
<ComboBox fx:id="cmbBox_Product" layoutX="288.0" layoutY="69.0" prefHeight="25.0" prefWidth="174.0" promptText="Select">
<items>
<FXCollections fx:factory="observableArrayList">
...
MaintainanceBacklog.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.String?>
<?import javafx.collections.FXCollections?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="maintainanceBacklog" prefHeight="791.0" prefWidth="1046.0" xmlns="http://javafx.com/javafx/8.0.141" xmlns:fx="http://javafx.com/fxml/1" fx:controller="reporting.controllers.MaintainanceBacklog_Controller">
<children>
<ComboBox fx:id="cmbBox_Product_MaintainanceBacklog" layoutX="151.0" layoutY="52.0" prefHeight="25.0" prefWidth="313.0" promptText="Select">
<items>
<FXCollections fx:factory="observableArrayList">
...
ErrorStackTrace
log4j:WARN No appenders could be found for logger (reporting.util.Util).
log4j:WARN Please initialize the log4j system properly.
Apr 20, 2018 3:37:16 PM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 8.0.141 by JavaFX runtime of version 8.0.122-ea
Apr 20, 2018 3:37:16 PM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 8.0.141 by JavaFX runtime of version 8.0.122-ea
Exception in Application init method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
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(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application init method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:912)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException:
/C:/SyntBotsServices/ProductionReporting/bin/reporting/design/MainScreen.fxml:13
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at application.Main.init(Main.java:72)
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:841)
... 2 more
Caused by: java.lang.IllegalArgumentException: Can not set reporting.controllers.BatchProcesses_Controller field reporting.controllers.MainScreen_Controller.batchProcesses_Controller to javafx.scene.layout.AnchorPane
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
at java.lang.reflect.Field.set(Unknown Source)
at javafx.fxml.FXMLLoader.injectFields(FXMLLoader.java:1163)
at javafx.fxml.FXMLLoader.access$1600(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:857)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:751)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
... 6 more
Exception running application application.Main
回答1:
Since the root element of BatchProcesses.fxml is a <AnchorPane> element, an AnchorPane is created for the following line.
<fx:include fx:id="batchProcesses_Controller" source="BatchProcesses.fxml" />
The field in your controller corresponding to the value of the fx:id attribute is
@FXML private BatchProcesses_Controller batchProcesses_Controller;
FXMLLoader fails to assign a AnchorPane to a field of type BatchProcesses_Controller for obvious reasons.
If you need the controller of the included fxml to be assigned to a controller field, you need to use append Controller to the fx:id of the <fx:include>:
@FXML private AnchorPane batchProcesses_Controller;
@FXML private BatchProcesses_Controller batchProcesses_ControllerController;
来源：https://stackoverflow.com/questions/49945101/passing-data-from-one-controller-to-another-in-javafx-java-lang-illegalargument