| java.lang.Object | |
| ↳ | java.awt.MenuComponent |
 Known Direct Subclasses
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Known Indirect Subclasses
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Class Overview
The abstract class 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.
Summary
| Nested Classes | |||||||||||
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| MenuComponent.AccessibleAWTMenuComponent | Inner class of MenuComponent used to provide
default support for accessibility. |
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| Public Constructors | |||||||||||
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Creates a
MenuComponent. | |||||||||||
| Public Methods | |||||||||||
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Delivers an event to this component or one of its sub components.
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Gets the
AccessibleContext associated with
this MenuComponent. | |||||||||||
Gets the font used for this menu component.
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Gets the name of the menu component.
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Returns the parent container for this menu component.
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This method is deprecated.
As of JDK version 1.1,
programs should not directly manipulate peers.
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This method is deprecated.
As of JDK version 1.1, replaced by
dispatchEvent.
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Removes the menu component's peer.
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Sets the font to be used for this menu component to the specified
font.
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Sets the name of the component to the specified string.
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Returns a representation of this menu component as a string.
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| Protected Methods | |||||||||||
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Gets this component's locking object (the object that owns the thread
sychronization monitor) for AWT component-tree and layout
operations.
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Returns a string representing the state of this
MenuComponent. | |||||||||||
Processes events occurring on this menu component.
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[Expand]
Inherited Methods | |||||||||||
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From class
java.lang.Object
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Public Constructors
public MenuComponent ()
Creates a MenuComponent.
Throws
| HeadlessException | if
GraphicsEnvironment.isHeadless
returns true |
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See Also
Public Methods
public final void dispatchEvent (AWTEvent e)
Delivers an event to this component or one of its sub components.
Parameters
| e | the event |
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public AccessibleContext getAccessibleContext ()
Gets the 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.
Returns
- the
AccessibleContextof thisMenuComponent
public Font getFont ()
Gets the font used for this menu component.
Returns
- the font used in this menu component, if there is one;
nullotherwise
See Also
public String getName ()
Gets the name of the menu component.
Returns
- the name of the menu component
See Also
public MenuContainer getParent ()
Returns the parent container for this menu component.
Returns
- the menu component containing this menu component,
or
nullif this menu component is the outermost component, the menu bar itself
public MenuComponentPeer getPeer ()
This method is deprecated.
As of JDK version 1.1,
programs should not directly manipulate peers.
public boolean postEvent (Event evt)
This method is deprecated.
As of JDK version 1.1, replaced by dispatchEvent.
Posts the specified event to the menu. This method is part of the Java 1.0 event system and it is maintained only for backwards compatibility. Its use is discouraged, and it may not be supported in the future.
Parameters
| evt | the event which is to take place |
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public void removeNotify ()
Removes the menu component's peer. The peer allows us to modify the appearance of the menu component without changing the functionality of the menu component.
public void setFont (Font f)
Sets the font to be used for this menu component to the specified font. This font is also used by all subcomponents of this menu component, unless those subcomponents specify a different font.
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.
Parameters
| f | the font to be set |
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public void setName (String name)
Sets the name of the component to the specified string.
Parameters
| name | the name of the menu component |
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See Also
public String toString ()
Returns a representation of this menu component as a string.
Returns
- a string representation of this menu component
Protected Methods
protected final Object getTreeLock ()
Gets this component's locking object (the object that owns the thread sychronization monitor) for AWT component-tree and layout operations.
Returns
- this component's locking object
protected String paramString ()
Returns a string representing the state of this
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.
Returns
- the parameter string of this menu component
protected void processEvent (AWTEvent e)
Processes events occurring on this menu component.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
Parameters
| e | the event |
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