java.lang.NoClassDefoundError：com/sun/javafx/css/converters/sizeConverter

Question

我正在SceneBuilder中创建一个JavaFX应用程序。

我的FXML包含自定义的gluon JavaFX对象。

我正在使用他们的'AppBar'和'Icon'对象。

在加载fxml文件时，我得到一个'java.lang.NoClassDefoundError：com/sun/javafx/css/converters/sizeConverter'错误。

全跟踪：

 Exception in thread "JavaFX Application Thread" java.lang.NoClassDefFoundError: com/sun/javafx/css/converters/SizeConverter
        at com.gluonhq.charm.glisten.control.AppBar.<clinit>(SourceFile:409)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
        at java.base/java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:166)
        at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:404)
        at java.base/java.lang.Class.newInstance(Class.java:591)
        at javafx.fxml/javafx.fxml.FXMLLoader$InstanceDeclarationElement.constructValue(FXMLLoader.java:1019)
        at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:754)
        at javafx.fxml/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2722)
        at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2552)
        at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
        at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:2435)
        at src.main.java.MainScreen.profileClick(MainScreen.java:107)
        at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
        at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
        at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
        at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
        at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
        at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
        at javafx.graphics/javafx.scene.Node.fireEvent(Node.java:8890)
        at javafx.controls/javafx.scene.control.Button.fire(Button.java:203)
        at javafx.controls/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:206)
        at javafx.controls/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
        at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
        at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
        at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
        at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
        at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
        at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
        at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
        at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3862)
        at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1849)
        at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2590)
        at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:409)
        at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:299)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
        at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:447)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:412)
        at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:446)
        at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:556)
        at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:942)
        at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
        at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.ClassNotFoundException: com.sun.javafx.css.converters.SizeConverter
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 60 more

我已经检查了过去类似类型的问题，然而他们推荐的唯一解决方案是降级到Java8--这是一个Java13项目。

引用一个被接受的回应：

在Java 9中，上一个内部类

PaintConverter作为

paintConverter.javafx.graphics模块中的javafx.css.converter.paintConverter。

从以下方法调用加载：

private void profileClick( ActionEvent event) {
                clearScreen();

                Profile prof = new Profile();
                ProfileController profController = new ProfileController(prof);

                try{
                mainPane.setCenter(profController.getLoader().load());
              }
                catch(Exception e){
                  System.out.println(e);
                }

            }

其中“get loader”检索具有正确目录的FXML加载器。

我的gradle.build文件如下：

plugins {
    id 'java'
    id 'application'
    id 'org.openjfx.javafxplugin' version '0.0.8'
}

dependencies {
    testCompile 'junit:junit:4.12'
    testCompile 'org.testfx:testfx-junit:4.0.15-alpha'
    testCompile 'org.hamcrest:hamcrest-all:1.3'
      compile "com.opencsv:opencsv:4.0"
    compile 'com.gluonhq:charm:5.0.0'
}

repositories {
  jcenter()
  maven {
       url 'http://nexus.gluonhq.com/nexus/content/repositories/releases/'
   }
   mavenCentral()
   }

javafx {
    version = "13"
    modules = [ 'javafx.controls', 'javafx.fxml' ]
}

mainClassName = "src.main.java.MainScreen"

如何排除此错误？

Answer 1

考虑到JavaFX在8到9+之间的主要API更改（其中包括外观和css解析器的公开），任何运行在JavaFX 13上的项目都不能使用为Java 8创建的依赖项。

2018年发布的Gluon Mobile 5(com.gluonhq:charm:5.0.0)与《Java 8》兼容，这就解释了你遇到的例外情况。

有一个Gluon Mobile依赖项是为Java 9:5.0.0-JDK9编译的。

虽然这可能会解决您的问题，但该版本不再更新。

最新版本是6.0.2，这个版本是为JavaFX11+创建的。

这个版本也与GraalVM一起工作，并且使用客户端插件，允许为所有平台（桌面/移动/嵌入式）创建本机映像。

您可以在这里看到一个工作示例：HellogLuon。

该示例在桌面上运行良好，但Gluon移动库打算在移动（iOS/Android）上运行，并且它有商业许可。