java.lang.Object java.util.EventObject java.awt.AWTEvent java.awt.event.ActionEvent
A semantic event which indicates that a component-defined action
occurred.
occured.
This high-level event is generated by a component (such as a Button) when the component-specific action occurs (such as being pressed). The event is passed to every every ActionListener object that registered to receive such events using the component's addActionListener method.
Note: To invoke an ActionEvent on a Button using the keyboard, use the Space bar.
The object that implements the ActionListener interface gets this ActionEvent when the event occurs. The listener is therefore spared the details of processing individual mouse movements and mouse clicks, and can instead process a "meaningful" (semantic) event like "button pressed".
Field Summary | |
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static int |
ACTION_FIRST
The first number in the range of ids used for action events. |
static int |
ACTION_LAST
The last number in the range of ids used for action events. |
static int |
ACTION_PERFORMED
This event id indicates that a meaningful action occured. |
static int |
ALT_MASK
The alt modifier. |
static int |
CTRL_MASK
The control modifier. |
static int |
META_MASK
The meta modifier. |
static int |
SHIFT_MASK
The shift modifier. |
Fields inherited from class java.awt. AWTEvent |
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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 |
Fields inherited from class java.util. EventObject |
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source |
Constructor Summary | |
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ActionEvent
(
Object
source, int id,
String
command) Constructs an ActionEvent object. |
|
ActionEvent
(
Object
source, int id,
String
command, int modifiers) Constructs an ActionEvent object with modifier keys. |
|
ActionEvent
(
Object
source, int id,
String
command, long when, int modifiers) Constructs an ActionEvent object with the specified modifier keys and timestamp. |
Method Summary | |
---|---|
String |
getActionCommand
() Returns the command string associated with this action. |
int |
getModifiers
() Returns the modifier keys held down during this action event. |
long |
getWhen
() Returns the timestamp of when this event occurred. |
String |
paramString
() Returns a parameter string identifying this action 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 SHIFT_MASK
public static final int CTRL_MASK
public static final int META_MASK
public static final int ALT_MASK
public static final int ACTION_FIRST
public static final int ACTION_LAST
public static final int ACTION_PERFORMED
Constructor Detail |
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public ActionEvent(Object source, int id, String command)
Note that passing in an invalid id results in unspecified behavior. This method throws an IllegalArgumentException if source is null.
public ActionEvent(Object source, int id, String command, int modifiers)
Note that passing in an invalid id results in unspecified behavior. This method throws an IllegalArgumentException if source is null.
public ActionEvent(Object source, int id, String command, long when, int modifiers)
Note that passing in an invalid id results in unspecified behavior. This method throws an IllegalArgumentException if source is null.
Method Detail |
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public String getActionCommand()
public long getWhen()
public int getModifiers()
public String paramString()