Java Reference
In-Depth Information
Next, you learned about the
JSeparator
component and how you can use it as a menu
separator or as a visual display separator outside of menus.
You then explored the
JPopupMenu
, which
JMenu
uses to display its set of
JMenuItem
compo-
nents. For the
JPopupMenu
, you learned about the pop-up menu's own event/listener pair,
PopupMenuEvent
/
PopupMenuListener
.
Then the selectable menu elements in
JCheckBoxMenuItem
and
JRadioButtonMenuItem
were
explored with their
MenuElement
interface, and you saw how to create a custom menu component.
Menus aren't the only things that might pop up, so you explored
Popup
and
PopupFactory
.
Finally, the chapter covered the
JToolBar
class, a close cousin of Swing's menu classes.
In Chapter 7, you'll look at the different classes Swing provides for customizing the border
around a Swing component.
