JavaFX、On Mouse Entered

Question

NetBeansのシーンビルダで入力されたOn Mouseで自分の関数を呼び出す際に問題があります。 On Mouse Enteredイベントで簡単なコードを実行しようとしていますが、いくつかの例外があり、この問題を解決する方法がわかりません。 ボタンのプロパティで入力したマウスにこの関数を追加しましたが、機能しません。

これは私のコントローラのクラスです：

package firstapp; 
import java.awt.event.MouseEvent; 
import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.fxml.Initializable; 

public class firstAppController implements Initializable { 

@FXML 
private void handleButtonAction(ActionEvent event) { 
    System.out.println("You clicked me!"); 
} 

@FXML 
private void fun1(ActionEvent e) 
{ 
    System.out.println("It works"); 
} 

@FXML //this function doesn't work with On Mouse Entered 
public void fun2(MouseEvent e) 
{ 
    System.out.println("It works too"); 
} 

@Override 
public void initialize(URL url, ResourceBundle rb) { 
    // TODO 
} 
} 

そして、FXML：

<?import java.lang.*?> 
<?import java.util.*?> 
<?import javafx.scene.*?> 
<?import javafx.scene.control.*?> 
<?import javafx.scene.layout.*?> 

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" 
    xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" 
    fx:controller="firstapp.firstAppController"> 
    <children> 
     <Button fx:id="button1" layoutX="126" layoutY="90" onAction="#fun1" 
       onMouseEntered="#fun2" text="Click Me!" /> 
     <Label fx:id="label1" layoutX="69.0" layoutY="129.0" text="Label" /> 
    </children> 
</AnchorPane> 

そして出力：

Executing 
    C:\Users\Maczak\Desktop\NetBeans\firstApp\dist\run1545139292\firstApp.jar 
    using platform C:\Program Files\Java\jdk1.8.0_152\jre/bin/java 
    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$FXHelper.main(LauncherHelper.java:767) 
Caused by: java.lang.RuntimeException: Exception in Application start method 
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917) 
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182) 
    at java.lang.Thread.run(Thread.java:748) 
Caused by: javafx.fxml.LoadException: Error resolving onMouseEntered='#fun2', either the event handler is not in the Namespace or there is an error in the script. 
file:/C:/Users/Maczak/Desktop/NetBeans/firstApp/dist/run1545139292/firstApp.jar!/firstapp/firstApp.fxml:11 

    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$ValueElement.processEndElement(FXMLLoader.java:770) 
    at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104) 
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097) 
    at firstapp.FirstApp.start(FirstApp.java:22) 
    at com.sun.javafx.application.LauncherImpl.lambda$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) 
    ... 1 more 
Exception running application firstapp.FirstApp 
Java Result: 1 

fun2と何が問題なのですか？ fun2でOn Mouse Enteredイベントを作ることができないのはなぜですか？

Answer 1

誤ったインポートを使用しています。

あなたの輸入に

import javafx.scene.input.MouseEvent;