e819. highlighting buttons in a jtoolbar container while under the cursor.txt

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By default, a button in a toolbar does not change its appearance when the cursor is over the button. However, if the toolbar is in rollover mode, the buttons will highlight while under a cursor. 
    // Create a horizontal toolbar
    JToolBar toolbar = new JToolBar();
    
    // Get current rollover mode
    boolean b = toolbar.isRollover();
    
    // Enable rollover mode
    toolbar.setRollover(true);