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Chapter 21 java.awt.event Reference |
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ItemEvent 
Name
ItemEvent
![[Graphic: Figure from the text]](./figs/itemeve.gif)
Description
ItemEvents are generated by objects that implement the ItemSelectable interface. Choice is one example of such an object.
Class Definition
public class java.awt.event.ItemEvent
extends java.awt.AWTEvent {
// Constants
public final static int DESELECTED;
public final static int ITEM_FIRST;
public final static int ITEM_LAST;
public final static int ITEM_STATE_CHANGED;
public final static int SELECTED;
// Constructors
public ItemEvent (ItemSelectable source, int id, Object item, int stateChange);
// Instance Methods
public Object getItem();
public ItemSelectable getItemSelectable();
public int getStateChange();
public String paramString();
}
Constants
DESELECTED
public final static int DESELECTED
Indicates that an item was deselected.
ITEM_FIRST
public final static int ITEM_FIRST
Specifies the beginning range of item event ID values.
ITEM_LAST
public final static int ITEM_LAST
Specifies the ending range of item event ID values.
ITEM_STATE_CHANGED
public final static int ITEM_STATE_CHANGED
An event type indicating that an item was selected or deselected.
SELECTED
public final static int SELECTED
Indicates that an item was selected.
Constructors
ItemEvent
public ItemEvent (ItemSelectable source, int id, Object item, int stateChange)
- Parameters
-
- source
-
The object that generated the event.
- id
-
The type ID of the event.
- item
-
The item whose state is changing.
- stateChange
-
Either SELECTED or DESELECTED.
- source
- Description
-
Constructs an ItemEvent with the given characteristics.
Instance Methods
getItem
public Object getItem()
- Returns
-
The item pertaining to this event.
- Description
-
Returns the item whose changed state triggered this event.
getItemSelectable
public ItemSelectable getItemSelectable()
- Returns
-
The source of this event.
- Description
-
Returns an object that implements the ItemSelectable interface.
getStateChange
public int getStateChange()
- Returns
-
The change in state that triggered this event. The new state is returned.
- Description
-
This method will return SELECTED or DESELECTED.
paramString
public String paramString()
- Returns
-
String with current settings of ItemEvent.
- Overrides
-
AWTEvent.paramString()
- Description
-
Helper method for toString() to generate string of current settings.
See Also
AWTEvent, ItemSelectable, ItemListener
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| InputEvent |
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ItemListener |
