TreeView鼠标单击事件在JAVAFX中不起作用

Question

我是javaFX的初学者，并且在这里使用TreeView。我正在尝试使用鼠标事件，但这给了我一些我无法理解的错误。

Controller类

package application;
import java.net.URL;
import java.util.ResourceBundle;

import com.sun.glass.events.MouseEvent;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

public class MainController implements Initializable{

    @FXML
    TreeView<String> treeView;

    Image icon=new Image(
            getClass().getResourceAsStream("/img/folder.png"));
    @Override
    public void initialize(URL arg0, ResourceBundle arg1) {
        ImageView iconView=new ImageView(icon);
        iconView.setFitWidth(25);
        iconView.setFitHeight(25);
        TreeItem<String> root=new TreeItem<>("Root", iconView);
        //Set By Default Expanded
        root.setExpanded(true);

        TreeItem<String> nodeA=new TreeItem<>("Node A");
        TreeItem<String> nodeB=new TreeItem<>("Node B");
        TreeItem<String> nodeC=new TreeItem<>("Node C");
        TreeItem<String> nodeD=new TreeItem<>("Node D");
        //Expanded NodeA By Default             
        nodeA.setExpanded(true);
        TreeItem<String> nodeA1=new TreeItem<>("Node A");
        TreeItem<String> nodeB1=new TreeItem<>("Node B");
        TreeItem<String> nodeC1=new TreeItem<>("Node C");
        TreeItem<String> nodeD1=new TreeItem<>("Node D");

        root.getChildren().add(nodeA);
        root.getChildren().add(nodeB);
        root.getChildren().add(nodeC);
        root.getChildren().add(nodeD);

        nodeA.getChildren().addAll(nodeA1,nodeB1,nodeC1,nodeD1);
        treeView.setRoot(root);

    }
    public void mouseEvent(MouseEvent me) {
        TreeItem<String> item=treeView.getSelectionModel().getSelectedItem();
        System.out.println(item.getValue());
    }   
}

并且FXML文件代码为

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.TreeView?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="400.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainController">
   <children>
      <TreeView fx:id="treeView" layoutX="54.0" layoutY="62.0" onContextMenuRequested="#mouseEvent" onMouseClicked="#mouseEvent" prefHeight="277.0" prefWidth="293.0" />
   </children>
</AnchorPane>

其中在控制台中给出的错误为：

> Aug 26, 2018 11:36:11 AM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 9.0.1 by JavaFX runtime of version 8.0.161
javafx.fxml.LoadException: Error resolving onMouseClicked='#mouseEvent', either the event handler is not in the Namespace or there is an error in the script.
/C:/Users/Al%20Fateh/eclipse-workspace/TreeView/bin/application/Main.fxml:8

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
    at javafx.fxml.FXMLLoader.access$100(FXMLLoader.java:103)
    at javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
    at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
    at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at application.Main.start(Main.java:15)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    at java.lang.Thread.run(Unknown Source)