AWTKeyStroke (ocap 1.2 API)

java.lang.Object
- java.awt.AWTKeyStroke

All Implemented Interfaces:

Serializable
```
public class AWTKeyStroke
extends Object
implements Serializable
```
An AWTKeyStroke represents a key action on the keyboard, or equivalent input device. AWTKeyStrokes can correspond to only a press or release of a particular key, just as KEY_PRESSED and KEY_RELEASED KeyEvents do; alternately, they can correspond to typing a specific Java character, just as KEY_TYPED KeyEvents do. In all cases, AWTKeyStrokes can specify modifiers (alt, shift, control, meta, or a combination thereof) which must be present during the action for an exact match.
AWTKeyStrokes are immutable, and are intended to be unique. Client code should never create an AWTKeyStroke on its own, but should instead use a variant of getAWTKeyStroke. Client use of these factory methods allows the AWTKeyStroke implementation to cache and share instances efficiently.

Since:

1.4

Version:

1.14, 01/23/03

Author:

Arnaud Weber, David Mendenhall

See Also:
getAWTKeyStroke(char), Serialized Form

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object anObject)` Returns true if this object is identical to the specified object.
`static AWTKeyStroke`	`getAWTKeyStroke(char keyChar)` Returns a shared instance of an `AWTKeyStroke` that represents a `KEY_TYPED` event for the specified character.
`static AWTKeyStroke`	`getAWTKeyStroke(Character keyChar, int modifiers)` Returns a shared instance of an `AWTKeyStroke`, given a Character object and a set of modifiers.
`static AWTKeyStroke`	`getAWTKeyStroke(int keyCode, int modifiers)` Returns a shared instance of an `AWTKeyStroke`, given a numeric key code and a set of modifiers.
`static AWTKeyStroke`	`getAWTKeyStroke(int keyCode, int modifiers, boolean onKeyRelease)` Returns a shared instance of an `AWTKeyStroke`, given a numeric key code and a set of modifiers, specifying whether the key is activated when it is pressed or released.
`static AWTKeyStroke`	`getAWTKeyStroke(String s)` Parses a string and returns an `AWTKeyStroke`.
`static AWTKeyStroke`	`getAWTKeyStrokeForEvent(KeyEvent anEvent)` Returns an `AWTKeyStroke` which represents the stroke which generated a given `KeyEvent`.
`char`	`getKeyChar()` Returns the character for this `AWTKeyStroke`.
`int`	`getKeyCode()` Returns the numeric key code for this `AWTKeyStroke`.
`int`	`getKeyEventType()` Returns the type of `KeyEvent` which corresponds to this `AWTKeyStroke`.
`int`	`getModifiers()` Returns the modifier keys for this `AWTKeyStroke`.
`int`	`hashCode()` Returns a numeric value for this object that is likely to be unique, making it a good choice as the index value in a hash table.
`boolean`	`isOnKeyRelease()` Returns whether this `AWTKeyStroke` represents a key release.
`String`	`toString()` Returns a string that displays and identifies this object's properties.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - getAWTKeyStroke
```
public static AWTKeyStroke getAWTKeyStroke(char keyChar)
```
    Returns a shared instance of an AWTKeyStroke that represents a KEY_TYPED event for the specified character.
    
    Parameters:
    keyChar - the character value for a keyboard key
    
    Returns:
    an AWTKeyStroke object for that key
  - getAWTKeyStroke
```
public static AWTKeyStroke getAWTKeyStroke(Character keyChar,
                           int modifiers)
```
    Returns a shared instance of an AWTKeyStroke, given a Character object and a set of modifiers. Note that the first parameter is of type Character rather than char. This is to avoid inadvertent clashes with calls to getAWTKeyStroke(int keyCode, int modifiers). The modifiers consist of any combination of:
    - java.awt.event.InputEvent.SHIFT_DOWN_MASK
    - java.awt.event.InputEvent.CTRL_DOWN_MASK
    - java.awt.event.InputEvent.META_DOWN_MASK
    - java.awt.event.InputEvent.ALT_DOWN_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON1_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON2_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON3_DOWN_MASK
    The old modifiers
    - java.awt.event.InputEvent.SHIFT_MASK
    - java.awt.event.InputEvent.CTRL_MASK
    - java.awt.event.InputEvent.META_MASK
    - java.awt.event.InputEvent.ALT_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_MASK
    also can be used, but they are mapped to _DOWN_ modifiers. Since these numbers are all different powers of two, any combination of them is an integer in which each bit represents a different modifier key. Use 0 to specify no modifiers.
    Parameters:
    keyChar - the Character object for a keyboard character
    modifiers - a bitwise-ored combination of any modifiers
    
    Returns:
    an AWTKeyStroke object for that key
    
    Throws:
    
    IllegalArgumentException - if keyChar is null
    See Also:
    InputEvent
  - getAWTKeyStroke
```
public static AWTKeyStroke getAWTKeyStroke(int keyCode,
                           int modifiers,
                           boolean onKeyRelease)
```
    Returns a shared instance of an AWTKeyStroke, given a numeric key code and a set of modifiers, specifying whether the key is activated when it is pressed or released.
    The "virtual key" constants defined in java.awt.event.KeyEvent can be used to specify the key code. For example:
    - java.awt.event.KeyEvent.VK_ENTER
    - java.awt.event.KeyEvent.VK_TAB
    - java.awt.event.KeyEvent.VK_SPACE
    The modifiers consist of any combination of:
    - java.awt.event.InputEvent.SHIFT_DOWN_MASK
    - java.awt.event.InputEvent.CTRL_DOWN_MASK
    - java.awt.event.InputEvent.META_DOWN_MASK
    - java.awt.event.InputEvent.ALT_DOWN_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON1_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON2_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON3_DOWN_MASK
    The old modifiers
    - java.awt.event.InputEvent.SHIFT_MASK
    - java.awt.event.InputEvent.CTRL_MASK
    - java.awt.event.InputEvent.META_MASK
    - java.awt.event.InputEvent.ALT_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_MASK
    also can be used, but they are mapped to _DOWN_ modifiers. Since these numbers are all different powers of two, any combination of them is an integer in which each bit represents a different modifier key. Use 0 to specify no modifiers.
    Parameters:
    keyCode - an int specifying the numeric code for a keyboard key
    modifiers - a bitwise-ored combination of any modifiers
    onKeyRelease - true if the AWTKeyStroke should represent a key release; false otherwise
    
    Returns:
    an AWTKeyStroke object for that key
    See Also:
    KeyEvent, InputEvent
  - getAWTKeyStroke
```
public static AWTKeyStroke getAWTKeyStroke(int keyCode,
                           int modifiers)
```
    Returns a shared instance of an AWTKeyStroke, given a numeric key code and a set of modifiers. The returned AWTKeyStroke will correspond to a key press.
    The "virtual key" constants defined in java.awt.event.KeyEvent can be used to specify the key code. For example:
    - java.awt.event.KeyEvent.VK_ENTER
    - java.awt.event.KeyEvent.VK_TAB
    - java.awt.event.KeyEvent.VK_SPACE
    The modifiers consist of any combination of:
    - java.awt.event.InputEvent.SHIFT_DOWN_MASK
    - java.awt.event.InputEvent.CTRL_DOWN_MASK
    - java.awt.event.InputEvent.META_DOWN_MASK
    - java.awt.event.InputEvent.ALT_DOWN_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON1_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON2_DOWN_MASK
    - java.awt.event.InputEvent.BUTTON3_DOWN_MASK
    The old modifiers
    - java.awt.event.InputEvent.SHIFT_MASK
    - java.awt.event.InputEvent.CTRL_MASK
    - java.awt.event.InputEvent.META_MASK
    - java.awt.event.InputEvent.ALT_MASK
    - java.awt.event.InputEvent.ALT_GRAPH_MASK
    also can be used, but they are mapped to _DOWN_ modifiers. Since these numbers are all different powers of two, any combination of them is an integer in which each bit represents a different modifier key. Use 0 to specify no modifiers.
    Parameters:
    keyCode - an int specifying the numeric code for a keyboard key
    modifiers - a bitwise-ored combination of any modifiers
    
    Returns:
    an AWTKeyStroke object for that key
    See Also:
    KeyEvent, InputEvent
  - getAWTKeyStrokeForEvent
```
public static AWTKeyStroke getAWTKeyStrokeForEvent(KeyEvent anEvent)
```
    Returns an AWTKeyStroke which represents the stroke which generated a given KeyEvent.
    This method obtains the key char from a KeyTyped event, and the key code from a KeyPressed or KeyReleased event. The KeyEvent modifiers are obtained for all three types of KeyEvent.
    
    Parameters:
    anEvent - the KeyEvent from which to obtain the AWTKeyStroke
    
    Returns:
    the AWTKeyStroke that precipitated the event
  - getAWTKeyStroke
```
public static AWTKeyStroke getAWTKeyStroke(String s)
```
    Parses a string and returns an AWTKeyStroke. The string must have the following syntax:
```
    <modifiers>* (<typedID> | <pressedReleasedID>)

    modifiers := shift | control | ctrl | meta | alt | button1 | button2 | button3
    typedID := typed <typedKey>
    typedKey := string of length 1 giving Unicode character.
    pressedReleasedID := (pressed | released) key
    key := KeyEvent key code name, i.e. the name following "VK_".
 
```
    If typed, pressed or released is not specified, pressed is assumed. Here are some examples:
```
     "INSERT" => getAWTKeyStroke(KeyEvent.VK_INSERT, 0);
     "control DELETE" => getAWTKeyStroke(KeyEvent.VK_DELETE, InputEvent.CTRL_MASK);
     "alt shift X" => getAWTKeyStroke(KeyEvent.VK_X, InputEvent.ALT_MASK | InputEvent.SHIFT_MASK);
     "alt shift released X" => getAWTKeyStroke(KeyEvent.VK_X, InputEvent.ALT_MASK | InputEvent.SHIFT_MASK, true);
     "typed a" => getAWTKeyStroke('a');
 
```
    Parameters:
    s - a String formatted as described above
    
    Returns:
    an AWTKeyStroke object for that String
    
    Throws:
    
    IllegalArgumentException - if s is null, or is formatted incorrectly
  - getKeyChar
```
public final char getKeyChar()
```
    Returns the character for this AWTKeyStroke.
    
    Returns:
    a char value
    See Also:
    getAWTKeyStroke(char)
  - getKeyCode
```
public final int getKeyCode()
```
    Returns the numeric key code for this AWTKeyStroke.
    
    Returns:
    an int containing the key code value
    See Also:
    getAWTKeyStroke(int,int)
  - getModifiers
```
public final int getModifiers()
```
    Returns the modifier keys for this AWTKeyStroke.
    
    Returns:
    an int containing the modifiers
    See Also:
    getAWTKeyStroke(int,int)
  - isOnKeyRelease
```
public final boolean isOnKeyRelease()
```
    Returns whether this AWTKeyStroke represents a key release.
    
    Returns:
    true if this AWTKeyStroke represents a key release; false otherwise
    See Also:
    getAWTKeyStroke(int,int,boolean)
  - getKeyEventType
```
public final int getKeyEventType()
```
    Returns the type of KeyEvent which corresponds to this AWTKeyStroke.
    
    Returns:
    KeyEvent.KEY_PRESSED, KeyEvent.KEY_TYPED, or KeyEvent.KEY_RELEASED
    See Also:
    KeyEvent
  - hashCode
```
public int hashCode()
```
    Returns a numeric value for this object that is likely to be unique, making it a good choice as the index value in a hash table.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    an int that represents this object
    See Also:
    Object.equals(java.lang.Object), Hashtable
  - equals
```
public final boolean equals(Object anObject)
```
    Returns true if this object is identical to the specified object.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    anObject - the Object to compare this object to
    
    Returns:
    true if the objects are identical
    See Also:
    Object.hashCode(), Hashtable
  - toString
```
public String toString()
```
    Returns a string that displays and identifies this object's properties.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    a String representation of this object

Class AWTKeyStroke

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getAWTKeyStroke

getAWTKeyStroke

getAWTKeyStroke

getAWTKeyStroke

getAWTKeyStrokeForEvent

getAWTKeyStroke

getKeyChar

getKeyCode

getModifiers

isOnKeyRelease

getKeyEventType

hashCode

equals

toString