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java.lang.Objectjava.util.EventObject
java.awt.AWTEvent
java.awt.event.ComponentEvent
public class ComponentEvent
This class is for events generated when a component is moved, resized, hidden, or shown. These events normally do not need to be handled by the application, since the AWT system automatically takes care of them. This is also the superclass for other events on components, but ComponentListeners ignore such subclasses.
ComponentAdapter
,
ComponentListener
,
Serialized FormField Summary | |
---|---|
static int |
COMPONENT_FIRST
This is the first id in the range of ids used by this class. |
static int |
COMPONENT_HIDDEN
This id indicates that a component was hidden. |
static int |
COMPONENT_LAST
This is the last id in the range of ids used by this class. |
static int |
COMPONENT_MOVED
This id indicates that a component was moved. |
static int |
COMPONENT_RESIZED
This id indicates that a component was resized. |
static int |
COMPONENT_SHOWN
This id indicates that a component was shown. |
Fields inherited from class java.util.EventObject |
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source |
Constructor Summary | |
---|---|
ComponentEvent(Component source,
int id)
Initializes a new instance of ComponentEvent with the
specified source and id. |
Method Summary | |
---|---|
Component |
getComponent()
This method returns the event source as a Component . |
String |
paramString()
This method returns a string identifying this event. |
Methods inherited from class java.awt.AWTEvent |
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consume, getID, isConsumed, setSource, toString |
Methods inherited from class java.util.EventObject |
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getSource |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final int COMPONENT_FIRST
public static final int COMPONENT_LAST
public static final int COMPONENT_MOVED
public static final int COMPONENT_RESIZED
public static final int COMPONENT_SHOWN
public static final int COMPONENT_HIDDEN
Constructor Detail |
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public ComponentEvent(Component source, int id)
ComponentEvent
with the
specified source and id. Note that an invalid id leads to unspecified
results.
source
- the source of the eventid
- the event id
IllegalArgumentException
- if source is nullMethod Detail |
---|
public Component getComponent()
Component
. If the
source has subsequently been modified to a non-Component, this returns
null.
Component
, or nullpublic String paramString()
paramString
in class AWTEvent
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