Question

我是scala的新手并且正在练习制作GUI。我使用了以下代码：

import scala.swing._

class UI extends MainFrame {
  title = "GUI Program #1"
  preferredSize = new Dimension(320, 240)
  contents = new Label("Here is the contents!")
}

object GuiProgramOne {
  def main(args: Array[String]) {
    val ui = new UI
    ui.visible = true
    println("End of main function")
  }
}

并在build sbt中安装了swing库：

libraryDependencies += "org.scala-lang" % "scala-swing" % "2.10.2"

我看到有例外情况：

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Proxy$class
    at scala.swing.Window.<init>(Window.scala:25)
    at scala.swing.Frame.<init>(RichWindow.scala:75)
    at scala.swing.MainFrame.<init>(MainFrame.scala:19)
    at UI.<init>(GuiProgramOne.scala:3)
    at GuiProgramOne$.main(GuiProgramOne.scala:11)
    at GuiProgramOne.main(GuiProgramOne.scala)
Caused by: java.lang.ClassNotFoundException: scala.Proxy$class
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 6 more

我真的很困惑。有人可以指导我吗？感谢

我正在研究这些东西：

http://otfried.org/scala/index_28.html

运行scala.swing._时出现编译错误

0 个答案: