Parent root = FXMLLoader.load(getClass().getResource("kibAr//kibArPerson.fxml"));
第 12 行 src 包中的 kibAr 包
C:>java -jar person.jar
Exception in Application start method
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown So
urce)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$147(
Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$1/14832625.run(Unknow
n Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at kibAr.AnaEkran.start(AnaEkran.java:18)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153
(Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$50/25863743.run(Unkno
wn Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown
Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/27949311.run(Unkno
wn Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Sourc
e)
at com.sun.javafx.application.PlatformImpl$$Lambda$48/13569241.run(Unkno
wn Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown S
ource)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/31743054.run(Unkno
wn Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$38/7345883.run(Unknown So
urce)
... 1 more
当我运行 jar 文件不显示窗口后,我使用 Eclipse 创建了 jar 文件(导出>可运行的 jar 文件)。
从cmd运行jar文件并显示此错误后。我该如何解决这个问题?
由于您没有显示可重现的示例,并且可能会有一些错误,因此这里有一个确实有效的示例:
创建一个包应用程序并将此类放入其中:
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("/application/Test.fxml"));
Scene scene = new Scene(root,400,400);
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
在包应用程序中创建一个"Test.fxml"。
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8">
<children>
<Pane layoutX="-125.0" layoutY="-143.0" prefHeight="200.0" prefWidth="200.0">
<children>
<Button layoutX="134.0" layoutY="161.0" mnemonicParsing="false" text="Button" />
</children>
</Pane>
</children>
</AnchorPane>
在 Eclipse 中选择
导出 -> 可运行的 JAR 文件 -> 将所需的库提取到生成的 JAR 中
(当然,您需要指定正确的启动配置)
可以执行生成的 JAR。
如果你有别的东西,如果你需要帮助,你必须展示它。