ToggleGroup explicit management

[Scott Palmer]

The docs for ToggleGroup say:
"Generally ToggleGroups are managed automatically simply by specifying the
name of a ToggleGroup on the
Toggle<http://docs.oracle.com/javafx/2/api/javafx/scene/control/Toggle.html>,
but in some situations it is desirable to explicitly manage which
ToggleGroup is used by
Toggles<http://docs.oracle.com/javafx/2/api/javafx/scene/control/Toggle.html>
."

Well, I tried to "explicitly manage" them, but I get :
...
Caused by: java.lang.IllegalArgumentException: Duplicate toggles are not
allow in a ToggleGroup.
    at
javafx.scene.control.ToggleGroup$1.onProposedChange(ToggleGroup.java:63)
    at
com.sun.javafx.collections.VetoableObservableList.add(VetoableObservableList.java:165)
    at
com.sun.javafx.collections.ObservableListWrapper.add(ObservableListWrapper.java:144)
    at
javafx.scene.control.RadioMenuItem$1.invalidated(RadioMenuItem.java:151)
    at
javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:129)
    at
javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:163)
    at
javafx.scene.control.RadioMenuItem.setToggleGroup(RadioMenuItem.java:134)
    at javafx.scene.control.ToggleGroup$1.onChanged(ToggleGroup.java:87)
    at
com.sun.javafx.collections.VetoableObservableList.callObservers(VetoableObservableList.java:83)
    at
com.sun.javafx.collections.ObservableListWrapper.addAll(ObservableListWrapper.java:171)
    at
com.sun.javafx.collections.VetoableObservableList.addAll(VetoableObservableList.java:108)
    at
com.sun.javafx.collections.ObservableListWrapper.addAll(ObservableListWrapper.java:160)
    at
com.sun.javafx.collections.ObservableListWrapper.addAll(ObservableListWrapper.java:309)
    at toggletest.ToggleTest.start(ToggleTest.java:34)
    ...

This is just by doing:

        ToggleGroup toggleGroup = new ToggleGroup();
        RadioMenuItem [] radioButtons = new RadioMenuItem[] {
            new RadioMenuItem("One"),
            new RadioMenuItem("Two"),
            new RadioMenuItem("Three")
        };

        toggleGroup.getToggles().addAll(radioButtons);


Bug?

Scott