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java.lang.Objectjava.util.EventObject
java.awt.AWTEvent
java.awt.event.ComponentEvent
java.awt.event.ContainerEvent
public class ContainerEvent
This event is generated when a component is added or removed from a container. Applications do not ordinarily need to handle these events since the AWT system handles them internally.
ContainerAdapter
,
ContainerListener
,
Serialized FormField Summary | |
---|---|
static int |
COMPONENT_ADDED
This id indicates a component was added to the container. |
static int |
COMPONENT_REMOVED
This id indicates a component was removed from the container. |
static int |
CONTAINER_FIRST
This is the first id in the id range used by this class. |
static int |
CONTAINER_LAST
This is the last id in the id range used by this class. |
Fields inherited from class java.awt.event.ComponentEvent |
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COMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWN |
Fields inherited from class java.util.EventObject |
---|
source |
Constructor Summary | |
---|---|
ContainerEvent(Component source,
int id,
Component child)
Initializes a new instance of ContainerEvent with the
specified source and id. |
Method Summary | |
---|---|
Component |
getChild()
This method returns the child object that was added or removed from the container. |
Container |
getContainer()
Returns the source of this event as a Container . |
String |
paramString()
This method returns a string identifying this event. |
Methods inherited from class java.awt.event.ComponentEvent |
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getComponent |
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 CONTAINER_FIRST
public static final int CONTAINER_LAST
public static final int COMPONENT_ADDED
public static final int COMPONENT_REMOVED
Constructor Detail |
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public ContainerEvent(Component source, int id, Component child)
ContainerEvent
with the
specified source and id. Additionally, the affected child component
is also passed as a parameter. Note that an invalid id leads to
unspecified results.
source
- the source container of the eventid
- the event idchild
- the child component affected by this event
IllegalArgumentException
- if source is nullMethod Detail |
---|
public Container getContainer()
Container
.
ClassCastException
- if the source is changed to a non-Containerpublic Component getChild()
public String paramString()
(getID() == COMPONENT_ADDED ? "COMPONENT_ADDED"
: "COMPONENT_REMOVED") + ",child=" + getChild().getName()
.
paramString
in class ComponentEvent
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