How to use a scala.swing.Applet in a Scala Swing application?

I try to port some Java code to Scala.

I want to display a scala.swing.Applet in a GUI application.

With Java Swing I would do

val jframe = new JFrame() jframe.add(APPLET) jframe.setVisible(true) APPLET.setFocusCycleRoot(true) APPLET.init() APPLET.start() 

But code using Scala Swing

def top = new MainFrame { contents = APPLET } 

doesn't like the type:

error: type mismatch; found : scala.swing.Applet required: scala.swing.Component contents = APPLET 

When I try to add the Applet via the Java peers, it fails like this:

def top = new MainFrame { contents = new Panel() { peer.add(new SinglePlayerGame) } } 

I get this error message:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: scala.swing.Applet cannot be cast to javax.swing.JComponent at scala.swing.Container$Wrapper$$anon$1.componentAdded(Container.scala:43) at java.awt.Container.processContainerEvent(Container.java:2071) at java.awt.Container.processEvent(Container.java:2042) at java.awt.Component.dispatchEventImpl(Component.java:4629) at java.awt.Container.dispatchEventImpl(Container.java:2103) at java.awt.Component.dispatchEvent(Component.java:4455) at java.awt.Container.addImpl(Container.java:1081) at java.awt.Container.add(Container.java:373) 

How am I supposed to solve that problem?