java.lang.NoClassDefFoundError : com/sun/javafx/css/converters/SizeConverter

Question

我正在 scenebuilder 中创建一个 JavaFX 应用程序。

我的 FXML 包含自定义胶子 JavaFX 对象。

我正在使用他们的“AppBar”和“Icon”对象。

加载 fxml 文件时，出现“java.lang.NoClassDefFoundError: com/sun/javafx/css/converters/SizeConverter”错误。

完整跟踪:

 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

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

引用已接受的回复:

In Java 9, the previous internal class

com.sun.javafx.css.converters.PaintConverter became public as

javafx.css.converter.PaintConverter in the module javafx.graphics.

从此方法调用加载:

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“getLoader”检索具有正确目录的 FXML 加载程序。

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"

如何解决此错误？

Answer 1

鉴于 JavaFX 8 到 9+ 之间的主要 API 更改(其中包括公开了外观和 css 解析器)，在 JavaFX 13 上运行的任何项目都无法使用为 Java 8 创建的依赖项。

Gluon Mobile 5 (com.gluonhq:charm:5.0.0) 于 2018 年发布，适用于 Java 8，这解释了您遇到的异常。

有一个针对 Java 9 编译的 Gluon Mobile 依赖项:5.0.0-jdk9 .

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，该版本是为 JavaFX 11+ 创建的。

此版本还可以与 GraalVM 配合使用，并使用 Client plugin ，允许为所有平台(桌面/移动/嵌入式)创建 native 图像。

您可以在此处查看工作示例:HelloGluon 。

该示例在桌面上运行良好，但 Gluon Mobile 库旨在在移动设备(iOS/Android)上运行，并且具有商业许可证。