JButton.getUI method
would return an instance of MultiButtonUI,
which would handle both a
MotifButtonUI and an AudioButtonUI. 
   
For more information, see Using the Multiplexing Look and Feel.
Note: Most of the Swing API is not thread safe. For details, see Threads and Swing, a section in The Java Tutorial.
| MultiButtonUI | A multiplexing UI used to combine ButtonUIs. | 
| MultiColorChooserUI | A multiplexing UI used to combine ColorChooserUIs. | 
| MultiComboBoxUI | A multiplexing UI used to combine ComboBoxUIs. | 
| MultiDesktopIconUI | A multiplexing UI used to combine DesktopIconUIs. | 
| MultiDesktopPaneUI | A multiplexing UI used to combine DesktopPaneUIs. | 
| MultiFileChooserUI | A multiplexing UI used to combine FileChooserUIs. | 
| MultiInternalFrameUI | A multiplexing UI used to combine InternalFrameUIs. | 
| MultiLabelUI | A multiplexing UI used to combine LabelUIs. | 
| MultiListUI | A multiplexing UI used to combine ListUIs. | 
| MultiLookAndFeel | A multiplexing look and feel that allows more than one UI to be associated with a component at the same time. | 
| MultiMenuBarUI | A multiplexing UI used to combine MenuBarUIs. | 
| MultiMenuItemUI | A multiplexing UI used to combine MenuItemUIs. | 
| MultiOptionPaneUI | A multiplexing UI used to combine OptionPaneUIs. | 
| MultiPanelUI | A multiplexing UI used to combine PanelUIs. | 
| MultiPopupMenuUI | A multiplexing UI used to combine PopupMenuUIs. | 
| MultiProgressBarUI | A multiplexing UI used to combine ProgressBarUIs. | 
| MultiRootPaneUI | A multiplexing UI used to combine RootPaneUIs. | 
| MultiScrollBarUI | A multiplexing UI used to combine ScrollBarUIs. | 
| MultiScrollPaneUI | A multiplexing UI used to combine ScrollPaneUIs. | 
| MultiSeparatorUI | A multiplexing UI used to combine SeparatorUIs. | 
| MultiSliderUI | A multiplexing UI used to combine SliderUIs. | 
| MultiSpinnerUI | A multiplexing UI used to combine SpinnerUIs. | 
| MultiSplitPaneUI | A multiplexing UI used to combine SplitPaneUIs. | 
| MultiTabbedPaneUI | A multiplexing UI used to combine TabbedPaneUIs. | 
| MultiTableHeaderUI | A multiplexing UI used to combine TableHeaderUIs. | 
| MultiTableUI | A multiplexing UI used to combine TableUIs. | 
| MultiTextUI | A multiplexing UI used to combine TextUIs. | 
| MultiToolBarUI | A multiplexing UI used to combine ToolBarUIs. | 
| MultiToolTipUI | A multiplexing UI used to combine ToolTipUIs. | 
| MultiTreeUI | A multiplexing UI used to combine TreeUIs. | 
| MultiViewportUI | A multiplexing UI used to combine ViewportUIs. |