Question

我已经阅读了所有旧问题，但我不明白发生了什么。只有当我尝试将文件layout.fxml与控件类连接时才会出现问题。我试过1.000路径，但它不起作用...... 我需要你的帮助，抱歉这个愚蠢的问题:(

错误：

> 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$155(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: /Users/claudio/Documents/workspace/KlickiBunti/Layout.fxml (No such file or directory)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(FileInputStream.java:195)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:93)
    at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
    at java.net.URL.openStream(URL.java:1045)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2440)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at control.Main_Controller.start(Main_Controller.java:20)
    at com.sun.javafx.application.LauncherImpl.lambda$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 control.Main_Controller

Layout.fxml类：

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

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


<AnchorPane prefHeight="386.0" prefWidth="354.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8" fx:controller="Controller.java">
   <children>
      <MenuBar AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
        <menus>
          <Menu mnemonicParsing="false" text="File">
            <items>
              <MenuItem mnemonicParsing="false" text="Close" />
            </items>
          </Menu>
          <Menu mnemonicParsing="false" text="Edit">
            <items>
              <MenuItem mnemonicParsing="false" text="Delete" />
            </items>
          </Menu>
          <Menu mnemonicParsing="false" text="Help">
            <items>
              <MenuItem mnemonicParsing="false" text="About" />
            </items>
          </Menu>
        </menus>
      </MenuBar>
      <TextArea layoutX="14.0" layoutY="41.0" prefHeight="200.0" prefWidth="200.0" promptText="hey" />
   </children>
</AnchorPane>

主类：

package control;

import java.io.File;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.fxml.FXMLLoader;
public class Main_Controller extends Application{

    public static void main(String[] args) {
        // TODO Auto-generated method stub
launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        // TODO Auto-generated method stub

        stage.setScene(new Scene(FXMLLoader.load(new File("Layout.fxml").toURI().toURL())));
        stage.show();

    }

}

控制类：

package control;

public class Controller {

    Controller (){

        System.out.println("Try");

    }


}

3个类在同一个路径中。

也许对你来说是一个愚蠢的问题，但我试着用6个小时来解决我的问题-.-

Answer 1

错误信息非常明显：

Caused by: java.io.FileNotFoundException: /Users/claudio/Documents/workspace/KlickiBunti/Layout.fxml (No such file or directory).

您应该将FXML文件作为资源加载：如果（当）将应用程序捆绑为jar文件，FXML将不会是文件系统上的独立文件（即使您没有，{ {1}}相对于您无法控制的工作目录进行解析。

如果FXML文件与加载它的类在同一个包中，你应该这样做

new File()

如果它与控制器类stage.setScene(new Scene(FXMLLoader.load(getClass().getResource("Layout.fxml"))));位于同一个包中，您也可以

Controller

此外，stage.setScene(new Scene(FXMLLoader.load(Controller.class.getResource("Layout.fxml"))));属性期望控制器的完全限定类名（即fx:controller），而不是Java源文件（在运行时甚至不可用），原因很明显。）

Application start方法中的异常 - Javafx控件类

1 个答案: