MenuComponent (Java 2 Platform SE 5.0) (original) (raw)

java.awt

Class MenuComponent

java.lang.Object java.awt.MenuComponent

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

MenuBar, MenuItem

public abstract class MenuComponent

extends Object

implements Serializable

The abstract class MenuComponent is the superclass of all menu-related components. In this respect, the classMenuComponent is analogous to the abstract superclassComponent for AWT components.

Menu components receive and process AWT events, just as components do, through the method processEvent.

Since:

JDK1.0

See Also:

Serialized Form

MenuComponent

public MenuComponent() throws HeadlessException

Creates a MenuComponent.

Throws:

[HeadlessException](../../java/awt/HeadlessException.html "class in java.awt") - ifGraphicsEnvironment.isHeadless returns true

See Also:

GraphicsEnvironment.isHeadless()

getName

public String getName()

Gets the name of the menu component.

Returns:

the name of the menu component

Since:

JDK1.1

See Also:

setName(java.lang.String)

setName

public void setName(String name)

Sets the name of the component to the specified string.

Parameters:

name - the name of the menu component

Since:

JDK1.1

See Also:

getName()

getParent

public MenuContainer getParent()

Returns the parent container for this menu component.

Returns:

the menu component containing this menu component, or null if this menu component is the outermost component, the menu bar itself

getPeer

@Deprecated public java.awt.peer.MenuComponentPeer getPeer()

Deprecated. As of JDK version 1.1, programs should not directly manipulate peers.

getFont

public Font getFont()

Gets the font used for this menu component.

Returns:

the font used in this menu component, if there is one; null otherwise

See Also:

setFont(java.awt.Font)

setFont

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

See Also:

getFont(), Font.getAttributes(), TextAttribute

removeNotify

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.

postEvent

@Deprecated public boolean postEvent(Event evt)

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

dispatchEvent

public final void dispatchEvent(AWTEvent e)

processEvent

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

Since:

JDK1.1

paramString

protected String paramString()

Returns a string representing the state of thisMenuComponent. 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

toString

public String toString()

Returns a representation of this menu component as a string.

Overrides:

[toString](../../java/lang/Object.html#toString%28%29) in class [Object](../../java/lang/Object.html "class in java.lang")

Returns:

a string representation of this menu component

getTreeLock

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

getAccessibleContext

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 AccessibleContext of thisMenuComponent

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright © 2004, 2010 Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.