文档建议反馈控制台
首页
学习
活动
专区
圈层
工具
MCP广场
文章/答案/技术大牛
发布
首页
学习
活动
专区
圈层
工具
MCP广场
返回腾讯云官网
社区首页 >问答首页 >JavaFX切换fxml文件:线程中出现异常...InvocationTargetException

问JavaFX切换fxml文件:线程中出现异常...InvocationTargetException
EN

Stack Overflow用户
提问于 2019-01-14 05:42:12
回答 1查看 475关注 0票数 1

我有一个JavaFX应用程序，用户在其中按下一个按钮，这将加载一个新的fxml。这可以很好地工作。但是，当我在第二个fxml上创建另一个按钮以将用户带到第三个fxml时，我在控制台中得到了以下输出。很抱歉在下面放了这么多代码，我不知道什么是重要的或不重要的。有什么想法吗？它说有一个空指针，但我知道productivitySlider.fxml的文件路径是正确的。谢谢你的帮助。

代码语言：javascript
运行
复制
Jan 13, 2019 4:15:52 PM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 10.0.1 by JavaFX runtime of version 8.0.191
Jan 13, 2019 4:15:55 PM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 10.0.1 by JavaFX runtime of version 8.0.191
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Node.fireEvent(Node.java:8411)
    at javafx.scene.control.Button.fire(Button.java:185)
    at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
    at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
    at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
    at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:432)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
    at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
    at com.sun.glass.ui.View.notifyMouse(View.java:937)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
    ... 45 more
Caused by: java.lang.NullPointerException: Location is required.
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
    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.comfortControl.loadProductivity(comfortControl.java:26)
    ... 55 more

下面是我的主要java文件：

代码语言：javascript
运行
复制
package application;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) {
        try {

            // Load FXML file
            Parent root = FXMLLoader.load(getClass().getResource("HumansightFirstDraft.fxml"));

            // Create scene
            Scene scene = new Scene(root, 400, 600);

            //Load CSS
            scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());

            // Display application
            primaryStage.setScene(scene);
            primaryStage.setResizable(false);
            primaryStage.show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

下面分别是第一个和第二个comfortSlider.fxml文件(HumansightFirstDraft.fxml和fxml )：

代码语言：javascript
运行
复制
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.effect.Blend?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane fx:id="rootPane" prefHeight="600.0" prefWidth="400.0" stylesheets="@application.css" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.HumansightFirstDraftControl">
   <children>
      <Button fx:id="startSurvey" layoutX="135.0" layoutY="500.0" mnemonicParsing="false" onAction="#loadComfort" prefHeight="50.0" prefWidth="130.0" text="Daily Survey" textFill="WHITE">
         <font>
            <Font name="Oxygen" size="18.0" />
         </font>
         <effect>
            <Blend />
         </effect>
      </Button>
      <Label alignment="CENTER" focusTraversable="false" layoutX="60.0" layoutY="320.0" mouseTransparent="true" prefHeight="200.0" prefWidth="300.0" text="text1" wrapText="true">
         <font>
            <Font name="Oxygen" size="18.0" />
         </font>
      </Label>
   </children>
</AnchorPane>
代码语言：javascript
运行
复制
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Slider?>
<?import javafx.scene.effect.Blend?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane maxHeight="600.0" maxWidth="400.0" minHeight="600.0" minWidth="400.0" prefHeight="600" prefWidth="400" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.comfortControl">
   <children>
      <Label layoutX="70.0" layoutY="377.0" text="text2">
         <font>
            <Font name="Oxygen" size="18.0" />
         </font>
      </Label>
      <ImageView fitHeight="61.0" fitWidth="346.0" layoutX="32.0" layoutY="415.0" pickOnBounds="true" preserveRatio="true" style="-fx-scale-y: 1.4;">
         <image>
            <Image url="@../../bin/application/sliderColors.png" />
         </image>
      </ImageView>
      <Slider fx:id="comfortSlider" layoutX="36.0" layoutY="424.0" prefHeight="39.0" prefWidth="329.0">
         <effect>
            <Blend />
         </effect>
      </Slider>
      <Button fx:id="toProductivity" layoutX="135.0" layoutY="500.0" mnemonicParsing="false" onAction="#loadProductivity" prefHeight="50.0" prefWidth="130.0" stylesheets="@application.css" text="Next" textFill="WHITE">
         <font>
            <Font name="Oxygen" size="18.0" />
         </font>
      </Button>
   </children>
</AnchorPane>

下面分别是第一个和第二个控制器java文件：

代码语言：javascript
运行
复制
package application;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.layout.AnchorPane;

public class HumansightFirstDraftControl implements Initializable{

    @FXML
    private AnchorPane rootPane;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        // TODO Auto-generated method stub

    }

    @FXML
    private void loadComfort(ActionEvent event) throws IOException {
        AnchorPane pane = FXMLLoader.load(getClass().getResource("/application/comfortSlider.fxml"));
        rootPane.getChildren().setAll(pane);
    }

}
代码语言：javascript
运行
复制
package application;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.layout.AnchorPane;

public class comfortControl implements Initializable{

    @FXML
    private AnchorPane rootPane;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        // TODO Auto-generated method stub

    }

    @FXML
    private void loadProductivity(ActionEvent event) throws IOException {
        AnchorPane pane = FXMLLoader.load(getClass().getResource("/application/productivitySlider.fxml"));
        rootPane.getChildren().setAll(pane);
    }
}
fxml
runtimeexception
invocationtargetexception
nullpointerexception
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2019-01-14 08:21:14

对我来说，这是一个愚蠢的错误，但我会把我的解决方案贴出来，以防有人像我一样愚蠢。我所要做的就是将fx:id和anchorPane名称分别更改为更具体的名称。我给两个都取名为anchorPanes rootPanes，所以都很时髦。

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/54173477

复制
相关文章

相似问题

领券

腾讯云开发者

扫码关注腾讯云开发者

扫码关注腾讯云开发者

领取腾讯云代金券

热门产品

热门推荐

更多推荐

Copyright © 2013 - 2025 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有 

深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 深公网安备号 44030502008569

腾讯云计算（北京）有限责任公司 京ICP证150476号 |  京ICP备11018762号 | 京公网安备号11010802020287

问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档