當我將控制器附加到我的fxml文件時，我得到一個constructLoadException

Question

我正在使用SceneBuilder來構建Java GUI應用程序。我試圖將控制器附加到我的fxml文件，所以我可以在我的應用程序中具有實際的功能。我應該提到它在這之前沒有錯誤地運行。當我連接控制器，我得到了這個：

at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source) 
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
at javafx.fxml.FXMLLoader.load(Unknown Source) 
at t9.htmleditor.MainApp.showMainGUI(MainApp.java:54) 
at t9.htmleditor.MainApp.start(MainApp.java:24) 
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(Unknown Source) 
at com.sun.javafx.application.LauncherImpl$$Lambda$51/1730989841.run(Unknown Source) 
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown Source) 
at com.sun.javafx.application.PlatformImpl$$Lambda$45/1051754451.run(Unknown Source) 
at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Source) 
at com.sun.javafx.application.PlatformImpl$$Lambda$47/50177904.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown Source) 
at com.sun.javafx.application.PlatformImpl$$Lambda$46/1775282465.run(Unknown Source) 
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source) 
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) 
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source) 
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source) 
at java.lang.Thread.run(Unknown Source) 
Caused by: java.lang.IllegalArgumentException: Can not set java.awt.Button field t9.htmleditor.view.ToolContoller.PageTitle to javafx.scene.control.Button 
    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(Unknown Source) 
    at javafx.fxml.FXMLLoader.access$1600(Unknown Source) 
    at javafx.fxml.FXMLLoader$ValueElement.processValue(Unknown Source) 
    at javafx.fxml.FXMLLoader$ValueElement.processStartElement(Unknown Source) 
    at javafx.fxml.FXMLLoader.processStartElement(Unknown Source) 

我無法解釋這一點，並找出哪裏出了問題。任何人都可以將我指向正確的方向嗎？

這裏是我的controlller：

package t9.projectName.view; 

import java.awt.Button; 

import t9.hprojectName.MainApp; 
import javafx.fxml.FXML; 
import javafx.scene.Group; 
import javafx.scene.control.Label; 
import javafx.scene.control.TableColumn; 
import javafx.scene.control.TableView; 
import javafx.scene.layout.AnchorPane; 


public class ToolContoller { 

@FXML 
private Group ToolGroup; 

@FXML 
private AnchorPane TextTools; 

@FXML 
private Button Text; 
@FXML 
private Button TextHeader; 
@FXML 
private Button BackgroundColor; 
@FXML 
private Button Video; 
@FXML 
private Button PageTitle; 
@FXML 
private Button Templates; 
@FXML 
private Button Images; 

// Reference to the main application. 
private MainApp mainApp; 

/** 
* The constructor. 
* The constructor is called before the initialize() method. 
*/ 
public ToolContoller() { 
} 


/** 
* Is called by the main application to give a reference back to itself. 
* 
* @param mainApp 
*/ 
public void setMainApp(MainApp mainApp) { 
    this.mainApp = mainApp; 

} 

/** 
* Called when the user clicks on the delete button. 
*/ 
@FXML 
private void handleTextButton() { 
    TextTools.setVisible(true); 
} 


} 

Answer 1

的問題是你的進口。在你的控制器，你有：

import java.awt.Button; 

但你是在JavaFX的所以用：

import javafx.scene.control.Button 

你的堆棧跟蹤這條線告訴你發生了什麼

產生的原因：java.lang.IllegalArgumentException異常：無法將java.awt.Button字段t9.htmleditor.view.ToolContoller.PageTitle設置爲javafx.scene.control.Button