从终端运行JavaFX时出错-无法找到或加载主类 [英] Error while running JavaFX from terminal - Could not find or load main class
问题描述
需要一些巧妙的建议来解决此问题-好吧，使用简单的JavaFX应用程序时会出现某种问题.但是，在全部设置好后(例如模块路径)，存在一些问题，但是现在当我无法从终端运行.jar文件时该怎么办?好的，开始讨论使用Javafx不可能实现的任务:
Need some clever advice to solve this - well, some kind of problem while using simple JavaFX app. However, there was some problems while all is set-up (module path, for example), but what now when I just cannot run .jar file from terminal? Ok, start talk about mission-impossible-with-javafx:
我在Linux Mint 20上安装了Apache NetBeans12.已经安装了JDK，因此"java -version"返回"openjdk版本"11.0.7"".2020-04-14'...启动项目时完全没有问题-JavaFX应用程序可以正常工作.
I got Apache NetBeans 12 installed on Linux Mint 20. JDK is already installed, so 'java -version' returns 'openjdk version "11.0.7" 2020-04-14'... When start project there is no problem at all - JavaFX app works.
我需要该应用程序才能在Windows 8.1上运行，但是在此之前，我尝试使用 java -jar MyFile.jar 在我的Linux终端上运行此.jar文件.问题开始于此:在MyFile.jar 中说没有主清单属性.然后，我决定直接在jar文件(使用Archive Manager打开)中设置主类:MyFile.jar->META-INF->MANIFEST.MF并在最后一行添加: Main-Class:mypackage.MyClass
I need this app to work on Windows 8.1, but before that I tried to run this .jar file on my linux terminal using java -jar MyFile.jar.
Here the problem starts: it said no main manifest attribute, in MyFile.jar.
Then I decide to set the main class directly in jar file (opened using Archive Manager):
MyFile.jar -> META-INF -> MANIFEST.MF and add on last line: Main-Class: mypackage.MyClass
现在我有:错误:找不到或加载主类mypackage.MyClass原因:java.lang.NoClassDefFoundError:javafx/application/Application
好吧，如何以及为什么?
Ok, how and why?
仅需说一句，在NetBeans中，我还将主类设置为:项目->属性->运行->主类:mypackage.MyClass 和在VM选项中我添加了:-模块路径"/locationToJavaFX/javafx-sdk-11.0.2/lib"；--add-modules javafx.controls，javafx.fxml
Just to said that in NetBeans I also set main class in: Project -> Properties -> Run -> Main class: mypackage.MyClass and in VM options I added: --module-path "/locationToJavaFX/javafx-sdk-11.0.2/lib" --add-modules javafx.controls,javafx.fxml
在pom文件中，还设置了主类(由IDE生成):
In pom file, main class is also set (generated by IDE):
// other lines
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>0.0.4</version>
<configuration>
<mainClass>mypackage.MyClass</mainClass>
</configuration>
// other lines
和module-info看起来像:
and module-info looks like:
module mypackage {
requires javafx.controls;
requires javafx.fxml;
requires org.jsoup;
opens mypackage to javafx.fxml;
exports mypackage; // some people advice without this line, I tried but same problem
}
只想弄清楚-我尝试了stackoverflow上可用的所有内容(我不计算).我尝试在昨天和今天(将近2天)内解决此问题，但我做不到.
Just want to be clear - I tried probably everything (I don't count) that is available here on stackoverflow. I try to fix this yesterday and today (almost 2 whole days) and I can't.
只是想一想:Java编程并不像配置那样困难.欢呼，感谢您的帮助！
Just a thought: Java programming is not so difficult as configuration is. Cheers and thanks for helping!
只是说我尝试了何塞建议:首先创建启动器类，逐步执行胖子罐"，然后运行他添加到帖子中的半胖子罐"命令.有趣的是，这返回了我:在启动层java.lang.module.FindException初始化期间发生错误:未找到模块javafx-fxml .如果我如上所述在Aready中定义了javafx-fxml，为什么不找到它呢?另外，为什么Netbeans不在清单文件(在jar中)中为我提供主类?当我在清单中添加主类时，我得到以下信息:
Just to said that I tried what José suggested : first creating launcher class, follow 'fat jar' step-by-step then run 'semi-fat jar' command which he added to the post. Interestingly enough, this return me: Error occurred during initialization of boot layer java.lang.module.FindException: Module javafx-fxml not found. Why not found javafx-fxml if I aready defined it as said above in question? Also, why Netbeans doesn't provide me the main class in manifest (in jar) file? When I add main class in manifest, I get this:
Exception in thread "main" java.lang.NoClassDefFoundError: javafx/application/Application
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:800)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:698)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:621)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at Main.main(Main.java:5) Caused by: java.lang.ClassNotFoundException: javafx.application.Application
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 10 more
好，怎么找不到应用程序?:)
Ok, how Application does not found? :)
是的，何塞先生拥有权利.实际上，该命令在他的半胖罐子"中有效，但不适用于Maven(我在同一个Ant项目上使用了它，并且有效).Maven无法识别JSoup类(即使我将其添加到依赖项中)，java也返回:
EDIT 2: Yeap, mister José has a right. This command in his 'semi-fat jar' post actually works BUT not for Maven (I use it on same Ant project and it works). Maven somehow cannot recognize JSoup class (even I add it in dependency) and java returns:
Exception in Application start method Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.NoClassDefFoundError: org/jsoup/Jsoup
at p.eis.GetData1.startIt(GetData1.java:34)
at p.eis.GetData1.<init>(GetData1.java:28)
at p.eis.SampleController.initialize(SampleController.java:37)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2573)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:2435)
at p.eis.Start.loadFXML(Start.java:32)
at p.eis.Start.start(Start.java:19)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.gtk.GtkApplication.lambda$runLoop$11(GtkApplication.java:277)
... 1 more Caused by: java.lang.ClassNotFoundException: org.jsoup.Jsoup
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 17 more
希望我会在不久的将来找到Maven项目的解决方案.
Hope I'll find solution for Maven projects in the near future.
推荐答案
这是因为我无法添加更多链接，所以我再次写了这个WinRar创建Jar文件
this is because i can't add more links that's why i again wrote this WinRar to create Jar File
从上一个答案继续，图像为 https://i.stack.imgur.com/fY1tw.png
Continue From Previous Answer and image that is https://i.stack.imgur.com/fY1tw.png
步骤2选择zip选项，然后将文件.zip的扩展名更改为.jar
我希望您了解我如何创建jar文件
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