jbcl.util Package 

BlackBox interface

com.borland.jbcl.util.BlackBox

About the BlackBox interface

Implemented by ButtonBar, ButtonControl, CheckboxControl, CheckboxPanel, ChoiceControl, FieldControl, GridControl, ImageControl, ListControl, LocatorControl, LookAndFeelComboBox, NavigatorControl, PickListItemEditor, ShapeControl, StatusBar, TabsetControl, TextAreaControl, TextControl, TextFieldControl, TreeControl

The BlackBox is an empty interface that signals that the component is a non-container. A component that implements BlackBox cannot have a layout or contain other objects within it, even if it is a subclass of Container.