錯誤的JavaFX FXML教程

我按照這個（https://blogs.oracle.com/jmxetc/entry/connecting_scenebuilder_edited_fxml_to）教程的每一步，卻不斷收到有關這部分的控制器類錯誤：錯誤的JavaFX FXML教程

myButton.setOnAction(new EventHandler<ActionEvent>() { 

     @Override 
     public void handle(ActionEvent event) { 
      System.out.println("That was easy, wasn't it?"); 
     } 
    });

我能想到的唯一的區別是，它是爲FX 2.0編寫的而不是8.0？

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:497) 
    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:497) 
    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$155(LauncherImpl.java:182) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: java.lang.Error: Unresolved compilation problems: 
    The method setOnAction(EventHandler<ActionEvent>) in the type ButtonBase is not applicable for the arguments (new EventHandler<ActionEvent>(){}) 
    EventHandler cannot be resolved to a type 
    The method handle(ActionEvent) of type new EventHandler<ActionEvent>(){} must override or implement a supertype method 

    at simple.SimpleController.initialize(SimpleController.java:24) 
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548) 
    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 simple.Main.start(Main.java:26) 
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863) 
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326) 
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294) 
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) 
Exception running application simple.Main

讓我知道如果你需要看到的類和FXML文件（DW，他們是很短）

謝謝！

PS-如果我需要澄清您的答案，請耐心等待，因爲作爲一名Java新手我經常感到困惑！

編輯1：

package simple; 

import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.fxml.FXML; 
import javafx.fxml.Initializable; 
import javafx.scene.control.Button; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 


public class SimpleController 
    implements Initializable { 

    @FXML // fx:id="myButton" 
    private Button myButton; // Value injected by FXMLLoader 


    @Override // This method is called by the FXMLLoader when initialization is complete 
    public void initialize(URL fxmlFileLocation, ResourceBundle resources) { 
     assert myButton != null : "fx:id=\"myButton\" was not injected: check your FXML file 'simple.fxml'."; 

     // initialize your logic here: all @FXML variables will have been injected 
     myButton.setOnAction(new EventHandler<ActionEvent>() { 

      @Override 
      public void handle(ActionEvent event) { 
       System.out.println("That was easy, wasn't it?"); 
      } 
     }); 
    } 

}

來源

2016-01-19 a-joyce

它說你有一個編譯錯誤，用'EventHandler'不被認可。請發佈'SimpleController'源代碼（包括導入）。 –

有幾個名爲'EventHandler'和'ActionEvent'的類，告訴我們你正在導入哪些類。 –

（我不知道你是否在我編輯問題時得到更新，所以在這裏！）通知！非常感謝你在這看我非常感謝 –

你缺少進口的EventHandler，你打錯了進口ActionEvent。（你也已經導入ActionListener出於某種原因，你從來沒有使用它。）

你的進口應該是

import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.fxml.FXML; 
import javafx.fxml.Initializable; 
import javafx.scene.control.Button; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler;

來源

2016-01-19 16:12:42

我知道它說避免+1評論，但嚴重謝謝你好先生 –

錯誤的JavaFX FXML教程

回答

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