Swing Menus and Toolbars - The Definitive Guide to Java Swing - page 171

■ Caution If the orientation property isn't set to a value equivalent to either JSeparator.HORIZONTAL or

JSeparator.VERTICAL , an IllegalArgumentException is thrown.

Customizing a JSeparator Look and Feel
The appearance of the JSeparator under the preinstalled set of look and feel types is shown
with the other menu components in Figure 6-3.
The available set of UIResource -related properties for a JSeparator is shown in Table 6-8.
For the JSeparator component, five different properties are available.

Table 6-8. JSeparator UIResource Elements

Property String Object Type

Separator.background Color

Separator.foreground Color

Separator.insets Insets

Separator.thickness Integer

SeparatorUI String

■ Caution Two additional properties, highlight and shadow , are present but deprecated and should not

be used.

JPopupMenu Class
The JPopupMenu component is the container for pop-up menu components, displayable anywhere
and used for support by JMenu . When a programmer-defined triggering event happens, you
display the JPopupMenu , and the menu displays the contained menu components. Like JMenuBar ,
JPopupMenu uses the SingleSelectionModel to manage the currently selected element.

Creating JPopupMenu Components
There are two constructors for JPopupMenu :

public JPopupMenu()
JPopupMenu jPopupMenu = new JPopupMenu();

public JPopupMenu(String title)
JPopupMenu jPopupMenu = new JPopupMenu("Welcome");