Serializable
public abstract class MenuComponent extends Object implements Serializable
MenuComponent
is the superclass of all menu-related components. In this respect, the class MenuComponent
is analogous to the abstract superclass Component
for AWT components. Menu components receive and process AWT events, just as components do, through the method processEvent
.
Modifier and Type | Class | Description |
---|---|---|
protected class |
MenuComponent.AccessibleAWTMenuComponent |
Inner class of MenuComponent used to provide default support for accessibility. |
Constructor | Description |
---|---|
MenuComponent() |
Creates a MenuComponent . |
Modifier and Type | Method | Description |
---|---|---|
final void |
dispatchEvent |
Delivers an event to this component or one of its sub components. |
AccessibleContext |
getAccessibleContext() |
Gets the AccessibleContext associated with this MenuComponent . |
Font |
getFont() |
Gets the font used for this menu component. |
String |
getName() |
Gets the name of the menu component. |
MenuContainer |
getParent() |
Returns the parent container for this menu component. |
protected final Object |
getTreeLock() |
Gets this component's locking object (the object that owns the thread synchronization monitor) for AWT component-tree and layout operations. |
protected String |
paramString() |
Returns a string representing the state of this MenuComponent . |
boolean |
postEvent |
Deprecated. |
protected void |
processEvent |
Processes events occurring on this menu component. |
void |
removeNotify() |
Removes the menu component's peer. |
void |
setFont |
Sets the font to be used for this menu component to the specified font. |
void |
setName |
Sets the name of the component to the specified string. |
String |
toString() |
Returns a representation of this menu component as a string. |
public MenuComponent() throws HeadlessException
MenuComponent
.HeadlessException
- if GraphicsEnvironment.isHeadless
returns true
public String getName()
public void setName(String name)
name
- the name of the menu componentpublic MenuContainer getParent()
null
if this menu component is the outermost component, the menu bar itselfpublic Font getFont()
null
otherwisepublic void setFont(Font f)
Some platforms may not support setting of all font attributes of a menu component; in such cases, calling setFont
will have no effect on the unsupported font attributes of this menu component. Unless subcomponents of this menu component specify a different font, this font will be used by those subcomponents if supported by the underlying platform.
f
- the font to be setpublic void removeNotify()
@Deprecated public boolean postEvent(Event evt)
dispatchEvent
.evt
- the event which is to take placepublic final void dispatchEvent(AWTEvent e)
e
- the eventprotected void processEvent(AWTEvent e)
Note that if the event parameter is null
the behavior is unspecified and may result in an exception.
e
- the eventprotected String paramString()
MenuComponent
. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null
.public String toString()
protected final Object getTreeLock()
public AccessibleContext getAccessibleContext()
AccessibleContext
associated with this MenuComponent
. The method implemented by this base class returns null
. Classes that extend MenuComponent
should implement this method to return the AccessibleContext
associated with the subclass.AccessibleContext
of this MenuComponent
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/MenuComponent.html
dispatchEvent
.