- OpenJDK 64位服务器虚拟机Zulu12.2+3-CA(构建12.0.1+12,混合模式,共享)
- Scala 2.12.7
- Windows 10专业版,X86_64
- IntelliJ IDEA 2019.1.3(旗舰版)
我从GitHub检出了scalafx-hello-world
,在IntelliJ中构建并运行它,一切都很好。下面是重要的应用程序实现:
package hello
import scalafx.application.JFXApp
import scalafx.application.JFXApp.PrimaryStage
import scalafx.geometry.Insets
import scalafx.scene.Scene
import scalafx.scene.effect.DropShadow
import scalafx.scene.layout.HBox
import scalafx.scene.paint.Color._
import scalafx.scene.paint._
import scalafx.scene.text.Text
object ScalaFXHelloWorld extends JFXApp {
stage = new PrimaryStage {
// initStyle(StageStyle.Unified)
title = "ScalaFX Hello World"
scene = new Scene {
fill = Color.rgb(38, 38, 38)
content = new HBox {
padding = Insets(50, 80, 50, 80)
children = Seq(
new Text {
text = "Scala"
style = "-fx-font: normal bold 100pt sans-serif"
fill = new LinearGradient(
endX = 0,
stops = Stops(Red, DarkRed))
},
new Text {
text = "FX"
style = "-fx-font: italic bold 100pt sans-serif"
fill = new LinearGradient(
endX = 0,
stops = Stops(White, DarkGray)
)
effect = new DropShadow {
color = DarkGray
radius = 15
spread = 0.25
}
}
)
}
}
}
}
编辑:我的 build.sbt 文件:
// Name of the project
name := "ScalaFX Hello World"
// Project version
version := "11-R16"
// Version of Scala used by the project
scalaVersion := "2.12.7"
// Add dependency on ScalaFX library
libraryDependencies += "org.scalafx" %% "scalafx" % "11-R16"
resolvers += Resolver.sonatypeRepo("snapshots")
scalacOptions ++= Seq("-unchecked", "-deprecation", "-Xcheckinit", "-encoding", "utf8", "-feature")
// Fork a new JVM for 'run' and 'test:run', to avoid JavaFX double initialization problems
fork := true
// Determine OS version of JavaFX binaries
lazy val osName = System.getProperty("os.name") match {
case n if n.startsWith("Linux") => "linux"
case n if n.startsWith("Mac") => "mac"
case n if n.startsWith("Windows") => "win"
case _ => throw new Exception("Unknown platform!")
}
// Add JavaFX dependencies
lazy val javaFXModules = Seq("base", "controls", "fxml", "graphics", "media", "swing", "web")
libraryDependencies ++= javaFXModules.map( m=>
"org.openjfx" % s"javafx-$m" % "11" classifier osName
)
之后,我将实现更改为:
package hello
import javafx.application.Application
import javafx.scene.Scene
import javafx.scene.control.Label
import javafx.stage.Stage
class ScalaFXHelloWorld extends Application {
override def start(stage: Stage): Unit = {
stage.setTitle("Does it work?")
stage.setScene(new Scene(
new Label("It works!")
))
stage.show()
}
}
object ScalaFXHelloWorld {
def main(args: Array[String]): Unit = {
Application.launch(classOf[ScalaFXHelloWorld], args: _*)
}
}
这里出现了以下错误:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: 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$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: java.lang.IllegalAccessError: superclass access check failed: class com.sun.javafx.scene.control.ControlHelper (in unnamed module @0x40ac0fa0) cannot access class com.sun.javafx.scene.layout.RegionHelper (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.scene.layout to unnamed module @0x40ac0fa0
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at javafx.scene.control.Control.<clinit>(Control.java:86)
at hello.ScalaFXHelloWorld.start(ScalaFXHelloWorld.scala:39)
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$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:389)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Exception running application hello.ScalaFXHelloWorld
现在我的问题是:ScalaFX有什么优点可以避免模块问题?
scalaVersion
设置为“2.12.8”或“2.13.0”,以防万一,因为与_Java_ 9+的兼容性仍在发展中,并且较新的_Scala_版本可能更好; (2)我注意到您正在使用_ZuluFX_,其中包括_OpenJFX_ 12,但您还下载了_OpenJFX_ 11模块作为依赖库 - 尝试注释掉build.sbt
中的libraryDependencies
语句。 - Mike AllenScalaFX
示例,尝试了一下(没有任何修改),它可以工作。然后我只修改了我在这里发布的单个文件,没有修改其他任何内容。这就是为什么我不明白发生了什么事情。 - Hannes