Serializable
public class ItemEvent extends AWTEvent
ItemListener
object which registered to receive such events using the component's addItemListener
method. The object that implements the ItemListener
interface gets this ItemEvent
when the event occurs. The listener is spared the details of processing individual mouse movements and mouse clicks, and can instead process a "meaningful" (semantic) event like "item selected" or "item deselected".
An unspecified behavior will be caused if the id
parameter of any particular ItemEvent
instance is not in the range from ITEM_FIRST
to ITEM_LAST
.
The stateChange
of any ItemEvent
instance takes one of the following values:
ItemEvent.SELECTED
ItemEvent.DESELECTED
Modifier and Type | Field | Description |
---|---|---|
static final int |
DESELECTED |
This state-change-value indicates that a selected item was deselected. |
static final int |
ITEM_FIRST |
The first number in the range of ids used for item events. |
static final int |
ITEM_LAST |
The last number in the range of ids used for item events. |
static final int |
ITEM_STATE_CHANGED |
This event id indicates that an item's state changed. |
static final int |
SELECTED |
This state-change value indicates that an item was selected. |
ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, WINDOW_STATE_EVENT_MASK
source
Constructor | Description |
---|---|
ItemEvent |
Constructs an ItemEvent object. |
Modifier and Type | Method | Description |
---|---|---|
Object |
getItem() |
Returns the item affected by the event. |
ItemSelectable |
getItemSelectable() |
Returns the originator of the event. |
int |
getStateChange() |
Returns the type of state change (selected or deselected). |
String |
paramString() |
Returns a parameter string identifying this item event. |
getSource
public static final int ITEM_FIRST
public static final int ITEM_LAST
public static final int ITEM_STATE_CHANGED
public static final int SELECTED
public static final int DESELECTED
public ItemEvent(ItemSelectable source, int id, Object item, int stateChange)
ItemEvent
object. This method throws an IllegalArgumentException
if source
is null
.
source
- The ItemSelectable
object that originated the eventid
- The integer that identifies the event type. For information on allowable values, see the class description for ItemEvent
item
- An object -- the item affected by the eventstateChange
- An integer that indicates whether the item was selected or deselected. For information on allowable values, see the class description for ItemEvent
IllegalArgumentException
- if source
is nullpublic ItemSelectable getItemSelectable()
public Object getItem()
public int getStateChange()
public String paramString()
paramString
in class AWTEvent
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
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).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/event/ItemEvent.html