我尝试使用javaFx构建一个Windows应用程序，当我尝试运行该应用程序时，它给了我这个。
ant -f D:\\java\\NetBeansProjects\\Login2 jfxsa-run init: Deleting:
D:\java\NetBeansProjects\Login2\build\built-jar.properties deps-jar:
Updating property file:
D:\java\NetBeansProjects\Login2\build\built-jar.properties Compiling 1
source file to D:\java\NetBeansProjects\Login2\build\classes compile:
Deleting directory D:\java\NetBeansProjects\Login2\dist\lib Copying 1
file to D:\java\NetBeansProjects\Login2\dist\lib Detected JavaFX Ant
API version 1.3 Launching <fx:jar> task from D:\Program Files
(x86)\Java\jdk1.8.0_161\jre\..\lib\ant-javafx.jar
Warning: From JDK7u25 the Codebase manifest attribute should be used to restrict JAR repurposing.
Please set manifest.custom.codebase property to override the current default non-secure value '*'. Launching <fx:deploy> task from
D:\Program Files (x86)\Java\jdk1.8.0_161\jre\..\lib\ant-javafx.jar No
base JDK. Package will use system JRE. No base JDK. Package will use
system JRE. jfx-deployment-script: jfx-deployment: jar: Copying 13
files to D:\java\NetBeansProjects\Login2\dist\run1325232323
jfx-project-run: Executing
D:\java\NetBeansProjects\Login2\dist\run1325232323\Login2.jar using
platform D:\Program Files (x86)\Java\jdk1.8.0_161\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$154(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at login2.Login2.start(Login2.java:22)
at com.sun.javafx.application.LauncherImpl.lambda$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 login2.Login2 Java Result: 1
Deleting directory D:\java\NetBeansProjects\Login2\dist\run1325232323
jfxsa-run: BUILD SUCCESSFUL (total time: 4 seconds)
FXMLDocumentController.java：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package login2;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
/**
*
* @author IULIAN-DANIELGLAVAN
*/
public class FXMLDocumentController implements Initializable {
@FXML
private Label label;
@FXML
private void handleClose(ActionEvent event) {
System.exit(0);
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
}
}
Login.java：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package login2;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
/**
*
* @author IULIAN-DANIELGLAVAN
*/
public class Login2 extends Application {
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("/FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
FXMLDocument.fxml：
<?xml version="1.0" encoding="UTF-8"?>
<?import com.jfoenix.controls.JFXButton?>
<?import com.jfoenix.controls.JFXPasswordField?>
<?import com.jfoenix.controls.JFXTextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<AnchorPane id="AnchorPane" prefHeight="271.0" prefWidth="610.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1" fx:controller="login2.FXMLDocumentController">
<children>
<JFXTextField layoutX="191.0" layoutY="94.0" prefHeight="30.0" prefWidth="235.0" promptText="Email" />
<JFXPasswordField layoutX="191.0" layoutY="144.0" prefHeight="25.0" prefWidth="235.0" promptText="Password" />
<JFXButton layoutX="511.0" layoutY="35.0" onMouseClicked="#handleClose" text="x">
<font>
<Font size="14.0" />
</font>
</JFXButton>
</children>
</AnchorPane>
我将jfoenix.jar放在库中。