KeyEvent (Java 2 Platform SE v1.4.2) - Java 2 SDK v1.4.2, Java 2 SDK 英文文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java^TM 2 Platform
Std. Ed. v1.4.2

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

java.awt.event
Class KeyEvent

java.lang.Object
  java.util.EventObject
      java.awt.AWTEvent
          java.awt.event.ComponentEvent
              java.awt.event.InputEvent
                  java.awt.event.KeyEvent

All Implemented Interfaces:: Serializable

Direct Known Subclasses:: MenuKeyEvent

public class KeyEvent
extends InputEvent

An event which indicates that a keystroke occurred in a component.

This low-level event is generated by a component object (such as a text field) when a key is pressed, released, or typed. The event is passed to every KeyListener or KeyAdapter object which registered to receive such events using the component's addKeyListener method. (KeyAdapter objects implement the KeyListener interface.) Each such listener object gets this KeyEvent when the event occurs.

"Key typed" events are higher-level and generally do not depend on the platform or keyboard layout. They are generated when a Unicode character is entered, and are the preferred way to find out about character input. In the simplest case, a key typed event is produced by a single key press (e.g., 'a'). Often, however, characters are produced by series of key presses (e.g., 'shift' + 'a'), and the mapping from key pressed events to key typed events may be many-to-one or many-to-many. Key releases are not usually necessary to generate a key typed event, but there are some cases where the key typed event is not generated until a key is released (e.g., entering ASCII sequences via the Alt-Numpad method in Windows). No key typed events are generated for keys that don't generate Unicode characters (e.g., action keys, modifier keys, etc.). The getKeyChar method always returns a valid Unicode character or CHAR_UNDEFINED. For key pressed and key released events, the getKeyCode method returns the event's keyCode. For key typed events, the getKeyCode method always returns VK_UNDEFINED.

"Key pressed" and "key released" events are lower-level and depend on the platform and keyboard layout. They are generated whenever a key is pressed or released, and are the only way to find out about keys that don't generate character input (e.g., action keys, modifier keys, etc.). The key being pressed or released is indicated by the getKeyCode method, which returns a virtual key code.

Virtual key codes are used to report which keyboard key has been pressed, rather than a character generated by the combination of one or more keystrokes (such as "A", which comes from shift and "a").

For example, pressing the Shift key will cause a KEY_PRESSED event with a VK_SHIFT keyCode, while pressing the 'a' key will result in a VK_A keyCode. After the 'a' key is released, a KEY_RELEASED event will be fired with VK_A. Separately, a KEY_TYPED event with a keyChar value of 'A' is generated.

Notes:

Key combinations which do not result in Unicode characters, such as action keys like F1 and the HELP key, do not generate KEY_TYPED events.
Not all keyboards or systems are capable of generating all virtual key codes. No attempt is made in Java to generate these keys artificially.
Virtual key codes do not identify a physical key: they depend on the platform and keyboard layout. For example, the key that generates VK_Q when using a U.S. keyboard layout will generate VK_A when using a French keyboard layout.
Not all characters have a keycode associated with them. For example, there is no keycode for the question mark because there is no keyboard for which it appears on the primary layer.
In order to support the platform-independent handling of action keys, the Java platform uses a few additional virtual key constants for functions that would otherwise have to be recognized by interpreting virtual key codes and modifiers. For example, for Japanese Windows keyboards, VK_ALL_CANDIDATES is returned instead of VK_CONVERT with the ALT modifier.

WARNING: Aside from those keys that are defined by the Java language (VK_ENTER, VK_BACK_SPACE, and VK_TAB), do not rely on the values of the VK_ constants. Sun reserves the right to change these values as needed to accomodate a wider range of keyboards in the future.

Since:: 1.1
See Also:: KeyAdapter, KeyListener, Tutorial: Writing a Key Listener, Reference: The Java Class Libraries (update file), Serialized Form

Field Summary

static char CHAR_UNDEFINED
          KEY_PRESSED and KEY_RELEASED events which do not map to a valid Unicode character use this for the keyChar value.

static int KEY_FIRST
          The first number in the range of ids used for key events.

static int KEY_LAST
          The last number in the range of ids used for key events.

static int KEY_LOCATION_LEFT
          A constant indicating that the key pressed or released is in the left key location (there is more than one possible location for this key).

static int KEY_LOCATION_NUMPAD
          A constant indicating that the key event originated on the numeric keypad or with a virtual key corresponding to the numeric keypad.

static int KEY_LOCATION_RIGHT
          A constant indicating that the key pressed or released is in the right key location (there is more than one possible location for this key).

static int KEY_LOCATION_STANDARD
          A constant indicating that the key pressed or released is not distinguished as the left or right version of a key, and did not originate on the numeric keypad (or did not originate with a virtual key corresponding to the numeric keypad).

static int KEY_LOCATION_UNKNOWN
          A constant indicating that the keyLocation is indeterminate or not relevant.

static int KEY_PRESSED
          The "key pressed" event.

static int KEY_RELEASED
          The "key released" event.

static int KEY_TYPED
          The "key typed" event.

static int VK_0
          VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39)

static int VK_1


static int VK_2


static int VK_3


static int VK_4


static int VK_5


static int VK_6


static int VK_7


static int VK_8


static int VK_9


static int VK_A
          VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A)

static int VK_ACCEPT
          Constant for the Accept or Commit function key.

static int VK_ADD


static int VK_AGAIN


static int VK_ALL_CANDIDATES
          Constant for the All Candidates function key.

static int VK_ALPHANUMERIC
          Constant for the Alphanumeric function key.

static int VK_ALT


static int VK_ALT_GRAPH
          Constant for the AltGraph function key.

static int VK_AMPERSAND


static int VK_ASTERISK


static int VK_AT
          Constant for the "@" key.

static int VK_B


static int VK_BACK_QUOTE


static int VK_BACK_SLASH


static int VK_BACK_SPACE


static int VK_BRACELEFT


static int VK_BRACERIGHT


static int VK_C


static int VK_CANCEL


static int VK_CAPS_LOCK


static int VK_CIRCUMFLEX
          Constant for the "^" key.

static int VK_CLEAR


static int VK_CLOSE_BRACKET


static int VK_CODE_INPUT
          Constant for the Code Input function key.

static int VK_COLON
          Constant for the ":" key.

static int VK_COMMA


static int VK_COMPOSE
          Constant for the Compose function key.

static int VK_CONTROL


static int VK_CONVERT
          Constant for the Convert function key.

static int VK_COPY


static int VK_CUT


static int VK_D


static int VK_DEAD_ABOVEDOT


static int VK_DEAD_ABOVERING


static int VK_DEAD_ACUTE


static int VK_DEAD_BREVE


static int VK_DEAD_CARON


static int VK_DEAD_CEDILLA


static int VK_DEAD_CIRCUMFLEX


static int VK_DEAD_DIAERESIS


static int VK_DEAD_DOUBLEACUTE


static int VK_DEAD_GRAVE


static int VK_DEAD_IOTA


static int VK_DEAD_MACRON


static int VK_DEAD_OGONEK


static int VK_DEAD_SEMIVOICED_SOUND


static int VK_DEAD_TILDE


static int VK_DEAD_VOICED_SOUND


static int VK_DECIMAL


static int VK_DELETE


static int VK_DIVIDE


static int VK_DOLLAR
          Constant for the "$" key.

static int VK_DOWN
          Constant for the non-numpad down arrow key.

static int VK_E


static int VK_END


static int VK_ENTER


static int VK_EQUALS


static int VK_ESCAPE


static int VK_EURO_SIGN
          Constant for the Euro currency sign key.

static int VK_EXCLAMATION_MARK
          Constant for the "!" key.

static int VK_F


static int VK_F1
          Constant for the F1 function key.

static int VK_F10
          Constant for the F10 function key.

static int VK_F11
          Constant for the F11 function key.

static int VK_F12
          Constant for the F12 function key.

static int VK_F13
          Constant for the F13 function key.

static int VK_F14
          Constant for the F14 function key.

static int VK_F15
          Constant for the F15 function key.

static int VK_F16
          Constant for the F16 function key.

static int VK_F17
          Constant for the F17 function key.

static int VK_F18
          Constant for the F18 function key.

static int VK_F19
          Constant for the F19 function key.

static int VK_F2
          Constant for the F2 function key.

static int VK_F20
          Constant for the F20 function key.

static int VK_F21
          Constant for the F21 function key.

static int VK_F22
          Constant for the F22 function key.

static int VK_F23
          Constant for the F23 function key.

static int VK_F24
          Constant for the F24 function key.

static int VK_F3
          Constant for the F3 function key.

static int VK_F4
          Constant for the F4 function key.

static int VK_F5
          Constant for the F5 function key.

static int VK_F6
          Constant for the F6 function key.

static int VK_F7
          Constant for the F7 function key.

static int VK_F8
          Constant for the F8 function key.

static int VK_F9
          Constant for the F9 function key.

static int VK_FINAL


static int VK_FIND


static int VK_FULL_WIDTH
          Constant for the Full-Width Characters function key.

static int VK_G


static int VK_GREATER


static int VK_H


static int VK_HALF_WIDTH
          Constant for the Half-Width Characters function key.

static int VK_HELP


static int VK_HIRAGANA
          Constant for the Hiragana function key.

static int VK_HOME


static int VK_I


static int VK_INPUT_METHOD_ON_OFF
          Constant for the input method on/off key.

static int VK_INSERT


static int VK_INVERTED_EXCLAMATION_MARK
          Constant for the inverted exclamation mark key.

static int VK_J


static int VK_JAPANESE_HIRAGANA
          Constant for the Japanese-Hiragana function key.

static int VK_JAPANESE_KATAKANA
          Constant for the Japanese-Katakana function key.

static int VK_JAPANESE_ROMAN
          Constant for the Japanese-Roman function key.

static int VK_K


static int VK_KANA


static int VK_KANA_LOCK
          Constant for the locking Kana function key.

static int VK_KANJI


static int VK_KATAKANA
          Constant for the Katakana function key.

static int VK_KP_DOWN
          Constant for the numeric keypad down arrow key.

static int VK_KP_LEFT
          Constant for the numeric keypad left arrow key.

static int VK_KP_RIGHT
          Constant for the numeric keypad right arrow key.

static int VK_KP_UP
          Constant for the numeric keypad up arrow key.

static int VK_L


static int VK_LEFT
          Constant for the non-numpad left arrow key.

static int VK_LEFT_PARENTHESIS
          Constant for the "(" key.

static int VK_LESS


static int VK_M


static int VK_META


static int VK_MINUS
          Constant for the "-" key.

static int VK_MODECHANGE


static int VK_MULTIPLY


static int VK_N


static int VK_NONCONVERT
          Constant for the Don't Convert function key.

static int VK_NUM_LOCK


static int VK_NUMBER_SIGN
          Constant for the "#" key.

static int VK_NUMPAD0


static int VK_NUMPAD1


static int VK_NUMPAD2


static int VK_NUMPAD3


static int VK_NUMPAD4


static int VK_NUMPAD5


static int VK_NUMPAD6


static int VK_NUMPAD7


static int VK_NUMPAD8


static int VK_NUMPAD9


static int VK_O


static int VK_OPEN_BRACKET


static int VK_P


static int VK_PAGE_DOWN


static int VK_PAGE_UP


static int VK_PASTE


static int VK_PAUSE


static int VK_PERIOD


static int VK_PLUS
          Constant for the "+" key.

static int VK_PREVIOUS_CANDIDATE
          Constant for the Previous Candidate function key.

static int VK_PRINTSCREEN


static int VK_PROPS


static int VK_Q


static int VK_QUOTE


static int VK_QUOTEDBL


static int VK_R


static int VK_RIGHT
          Constant for the non-numpad right arrow key.

static int VK_RIGHT_PARENTHESIS
          Constant for the ")" key.

static int VK_ROMAN_CHARACTERS
          Constant for the Roman Characters function key.

static int VK_S


static int VK_SCROLL_LOCK


static int VK_SEMICOLON


static int VK_SEPARATER
          This constant is obsolete, and is included only for backwards compatibility.

static int VK_SEPARATOR
          Constant for the Numpad Separator key.

static int VK_SHIFT


static int VK_SLASH


static int VK_SPACE


static int VK_STOP


static int VK_SUBTRACT


static int VK_T


static int VK_TAB


static int VK_U


static int VK_UNDEFINED
          This value is used to indicate that the keyCode is unknown.

static int VK_UNDERSCORE
          Constant for the "_" key.

static int VK_UNDO


static int VK_UP
          Constant for the non-numpad up arrow key.

static int VK_V


static int VK_W


static int VK_X


static int VK_Y


static int VK_Z


Fields inherited from class java.awt.event.InputEvent

ALT_DOWN_MASK, ALT_GRAPH_DOWN_MASK, ALT_GRAPH_MASK, ALT_MASK, BUTTON1_DOWN_MASK, BUTTON1_MASK, BUTTON2_DOWN_MASK, BUTTON2_MASK, BUTTON3_DOWN_MASK, BUTTON3_MASK, CTRL_DOWN_MASK, CTRL_MASK, META_DOWN_MASK, META_MASK, SHIFT_DOWN_MASK, SHIFT_MASK

Fields inherited from class java.awt.event.ComponentEvent

COMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWN

Fields inherited from class java.awt.AWTEvent

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

source

Constructor Summary

KeyEvent(Component source, int id, long when, int modifiers, int keyCode)
          Deprecated. as of JDK1.1

KeyEvent(Component source, int id, long when, int modifiers, int keyCode, char keyChar)
          Constructs a KeyEvent object.

KeyEvent(Component source, int id, long when, int modifiers, int keyCode, char keyChar, int keyLocation)


Method Summary

char getKeyChar()
          Returns the character associated with the key in this event.

int getKeyCode()
          Returns the integer keyCode associated with the key in this event.

int getKeyLocation()
          Returns the location of the key that originated this key event.

static String getKeyModifiersText(int modifiers)
          Returns a String describing the modifier key(s), such as "Shift", or "Ctrl+Shift".

static String getKeyText(int keyCode)
          Returns a String describing the keyCode, such as "HOME", "F1" or "A".

boolean isActionKey()
          Returns whether the key in this event is an "action" key.

String paramString()
          Returns a parameter string identifying this event.

void setKeyChar(char keyChar)
          Set the keyChar value to indicate a logical character.

void setKeyCode(int keyCode)
          Set the keyCode value to indicate a physical key.

void setModifiers(int modifiers)
          Deprecated. as of JDK1.1.4

Methods inherited from class java.awt.event.InputEvent

consume, getModifiers, getModifiersEx, getModifiersExText, getWhen, isAltDown, isAltGraphDown, isConsumed, isControlDown, isMetaDown, isShiftDown

Methods inherited from class java.awt.event.ComponentEvent

getComponent

Methods inherited from class java.awt.AWTEvent

getID, setSource, toString

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

KEY_FIRST

public static final int KEY_FIRST

The first number in the range of ids used for key events.

See Also:: Constant Field Values

KEY_LAST

public static final int KEY_LAST

The last number in the range of ids used for key events.

See Also:: Constant Field Values

KEY_TYPED

public static final int KEY_TYPED

The "key typed" event. This event is generated when a character is entered. In the simplest case, it is produced by a single key press. Often, however, characters are produced by series of key presses, and the mapping from key pressed events to key typed events may be many-to-one or many-to-many.

See Also:: Constant Field Values

KEY_PRESSED

public static final int KEY_PRESSED

The "key pressed" event. This event is generated when a key is pushed down.

See Also:: Constant Field Values

KEY_RELEASED

public static final int KEY_RELEASED

The "key released" event. This event is generated when a key is let up.

See Also:: Constant Field Values

VK_ENTER

public static final int VK_ENTER

See Also:: Constant Field Values

VK_BACK_SPACE

public static final int VK_BACK_SPACE

See Also:: Constant Field Values

VK_TAB

public static final int VK_TAB

See Also:: Constant Field Values

VK_CANCEL

public static final int VK_CANCEL

See Also:: Constant Field Values

VK_CLEAR

public static final int VK_CLEAR

See Also:: Constant Field Values

VK_SHIFT

public static final int VK_SHIFT

See Also:: Constant Field Values

VK_CONTROL

public static final int VK_CONTROL

See Also:: Constant Field Values

VK_ALT

public static final int VK_ALT

See Also:: Constant Field Values

VK_PAUSE

public static final int VK_PAUSE

See Also:: Constant Field Values

VK_CAPS_LOCK

public static final int VK_CAPS_LOCK

See Also:: Constant Field Values

VK_ESCAPE

public static final int VK_ESCAPE

See Also:: Constant Field Values

VK_SPACE

public static final int VK_SPACE

See Also:: Constant Field Values

VK_PAGE_UP

public static final int VK_PAGE_UP

See Also:: Constant Field Values

VK_PAGE_DOWN

public static final int VK_PAGE_DOWN

See Also:: Constant Field Values

VK_END

public static final int VK_END

See Also:: Constant Field Values

VK_HOME

public static final int VK_HOME

See Also:: Constant Field Values

VK_LEFT

public static final int VK_LEFT

Constant for the non-numpad left arrow key.

See Also:: VK_KP_LEFT, Constant Field Values

VK_UP

public static final int VK_UP

Constant for the non-numpad up arrow key.

See Also:: VK_KP_UP, Constant Field Values

VK_RIGHT

public static final int VK_RIGHT

Constant for the non-numpad right arrow key.

See Also:: VK_KP_RIGHT, Constant Field Values

VK_DOWN

public static final int VK_DOWN

Constant for the non-numpad down arrow key.

See Also:: VK_KP_DOWN, Constant Field Values

VK_COMMA

public static final int VK_COMMA

See Also:: Constant Field Values

VK_MINUS

public static final int VK_MINUS

Constant for the "-" key.

Since:: 1.2
See Also:: Constant Field Values

VK_PERIOD

public static final int VK_PERIOD

See Also:: Constant Field Values

VK_SLASH

public static final int VK_SLASH

See Also:: Constant Field Values

VK_0

public static final int VK_0

VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39)

See Also:: Constant Field Values

VK_1

public static final int VK_1

See Also:: Constant Field Values

VK_2

public static final int VK_2

See Also:: Constant Field Values

VK_3

public static final int VK_3

See Also:: Constant Field Values

VK_4

public static final int VK_4

See Also:: Constant Field Values

VK_5

public static final int VK_5

See Also:: Constant Field Values

VK_6

public static final int VK_6

See Also:: Constant Field Values

VK_7

public static final int VK_7

See Also:: Constant Field Values

VK_8

public static final int VK_8

See Also:: Constant Field Values

VK_9

public static final int VK_9

See Also:: Constant Field Values

VK_SEMICOLON

public static final int VK_SEMICOLON

See Also:: Constant Field Values

VK_EQUALS

public static final int VK_EQUALS

See Also:: Constant Field Values

VK_A

public static final int VK_A

VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A)

See Also:: Constant Field Values

VK_B

public static final int VK_B

See Also:: Constant Field Values

VK_C

public static final int VK_C

See Also:: Constant Field Values

VK_D

public static final int VK_D

See Also:: Constant Field Values

VK_E

public static final int VK_E

See Also:: Constant Field Values

VK_F

public static final int VK_F

See Also:: Constant Field Values

VK_G

public static final int VK_G

See Also:: Constant Field Values

VK_H

public static final int VK_H

See Also:: Constant Field Values

VK_I

public static final int VK_I

See Also:: Constant Field Values

VK_J

public static final int VK_J

See Also:: Constant Field Values

VK_K

public static final int VK_K

See Also:: Constant Field Values

VK_L

public static final int VK_L

See Also:: Constant Field Values

VK_M

public static final int VK_M

See Also:: Constant Field Values

VK_N

public static final int VK_N

See Also:: Constant Field Values

VK_O

public static final int VK_O

See Also:: Constant Field Values

VK_P

public static final int VK_P

See Also:: Constant Field Values

VK_Q

public static final int VK_Q

See Also:: Constant Field Values

VK_R

public static final int VK_R

See Also:: Constant Field Values

VK_S

public static final int VK_S

See Also:: Constant Field Values

VK_T

public static final int VK_T

See Also:: Constant Field Values

VK_U

public static final int VK_U

See Also:: Constant Field Values

VK_V

public static final int VK_V

See Also:: Constant Field Values

VK_W

public static final int VK_W

See Also:: Constant Field Values

VK_X

public static final int VK_X

See Also:: Constant Field Values

VK_Y

public static final int VK_Y

See Also:: Constant Field Values

VK_Z

public static final int VK_Z

See Also:: Constant Field Values

VK_OPEN_BRACKET

public static final int VK_OPEN_BRACKET

See Also:: Constant Field Values

VK_BACK_SLASH

public static final int VK_BACK_SLASH

See Also:: Constant Field Values

VK_CLOSE_BRACKET

public static final int VK_CLOSE_BRACKET

See Also:: Constant Field Values

VK_NUMPAD0

public static final int VK_NUMPAD0

See Also:: Constant Field Values

VK_NUMPAD1

public static final int VK_NUMPAD1

See Also:: Constant Field Values

VK_NUMPAD2

public static final int VK_NUMPAD2

See Also:: Constant Field Values

VK_NUMPAD3

public static final int VK_NUMPAD3

See Also:: Constant Field Values

VK_NUMPAD4

public static final int VK_NUMPAD4

See Also:: Constant Field Values

VK_NUMPAD5

public static final int VK_NUMPAD5

See Also:: Constant Field Values

VK_NUMPAD6

public static final int VK_NUMPAD6

See Also:: Constant Field Values

VK_NUMPAD7

public static final int VK_NUMPAD7

See Also:: Constant Field Values

VK_NUMPAD8

public static final int VK_NUMPAD8

See Also:: Constant Field Values

VK_NUMPAD9

public static final int VK_NUMPAD9

See Also:: Constant Field Values

VK_MULTIPLY

public static final int VK_MULTIPLY

See Also:: Constant Field Values

VK_ADD

public static final int VK_ADD

See Also:: Constant Field Values

VK_SEPARATER

public static final int VK_SEPARATER

This constant is obsolete, and is included only for backwards compatibility.

See Also:: VK_SEPARATOR, Constant Field Values

VK_SEPARATOR

public static final int VK_SEPARATOR

Constant for the Numpad Separator key.

Since:: 1.4
See Also:: Constant Field Values

VK_SUBTRACT

public static final int VK_SUBTRACT

See Also:: Constant Field Values

VK_DECIMAL

public static final int VK_DECIMAL

See Also:: Constant Field Values

VK_DIVIDE

public static final int VK_DIVIDE

See Also:: Constant Field Values

VK_DELETE

public static final int VK_DELETE

See Also:: Constant Field Values

VK_NUM_LOCK

public static final int VK_NUM_LOCK

See Also:: Constant Field Values

VK_SCROLL_LOCK

public static final int VK_SCROLL_LOCK

See Also:: Constant Field Values

VK_F1

public static final int VK_F1

Constant for the F1 function key.

See Also:: Constant Field Values

VK_F2

public static final int VK_F2

Constant for the F2 function key.

See Also:: Constant Field Values

VK_F3

public static final int VK_F3

Constant for the F3 function key.

See Also:: Constant Field Values

VK_F4

public static final int VK_F4

Constant for the F4 function key.

See Also:: Constant Field Values

VK_F5

public static final int VK_F5

Constant for the F5 function key.

See Also:: Constant Field Values

VK_F6

public static final int VK_F6

Constant for the F6 function key.

See Also:: Constant Field Values

VK_F7

public static final int VK_F7

Constant for the F7 function key.

See Also:: Constant Field Values

VK_F8

public static final int VK_F8

Constant for the F8 function key.

See Also:: Constant Field Values

VK_F9

public static final int VK_F9

Constant for the F9 function key.

See Also:: Constant Field Values

VK_F10

public static final int VK_F10

Constant for the F10 function key.

See Also:: Constant Field Values

VK_F11

public static final int VK_F11

Constant for the F11 function key.

See Also:: Constant Field Values

VK_F12

public static final int VK_F12

Constant for the F12 function key.

See Also:: Constant Field Values

VK_F13

public static final int VK_F13

Constant for the F13 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F14

public static final int VK_F14

Constant for the F14 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F15

public static final int VK_F15

Constant for the F15 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F16

public static final int VK_F16

Constant for the F16 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F17

public static final int VK_F17

Constant for the F17 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F18

public static final int VK_F18

Constant for the F18 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F19

public static final int VK_F19

Constant for the F19 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F20

public static final int VK_F20

Constant for the F20 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F21

public static final int VK_F21

Constant for the F21 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F22

public static final int VK_F22

Constant for the F22 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F23

public static final int VK_F23

Constant for the F23 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_F24

public static final int VK_F24

Constant for the F24 function key.

Since:: 1.2
See Also:: Constant Field Values

VK_PRINTSCREEN

public static final int VK_PRINTSCREEN

See Also:: Constant Field Values

VK_INSERT

public static final int VK_INSERT

See Also:: Constant Field Values

VK_HELP

public static final int VK_HELP

See Also:: Constant Field Values

VK_META

public static final int VK_META

See Also:: Constant Field Values

VK_BACK_QUOTE

public static final int VK_BACK_QUOTE

See Also:

Field Summary
`static char`	`CHAR_UNDEFINED` KEY_PRESSED and KEY_RELEASED events which do not map to a valid Unicode character use this for the keyChar value.
`static int`	`KEY_FIRST` The first number in the range of ids used for key events.
`static int`	`KEY_LAST` The last number in the range of ids used for key events.
`static int`	`KEY_LOCATION_LEFT` A constant indicating that the key pressed or released is in the left key location (there is more than one possible location for this key).
`static int`	`KEY_LOCATION_NUMPAD` A constant indicating that the key event originated on the numeric keypad or with a virtual key corresponding to the numeric keypad.
`static int`	`KEY_LOCATION_RIGHT` A constant indicating that the key pressed or released is in the right key location (there is more than one possible location for this key).
`static int`	`KEY_LOCATION_STANDARD` A constant indicating that the key pressed or released is not distinguished as the left or right version of a key, and did not originate on the numeric keypad (or did not originate with a virtual key corresponding to the numeric keypad).
`static int`	`KEY_LOCATION_UNKNOWN` A constant indicating that the keyLocation is indeterminate or not relevant.
`static int`	`KEY_PRESSED` The "key pressed" event.
`static int`	`KEY_RELEASED` The "key released" event.
`static int`	`KEY_TYPED` The "key typed" event.
`static int`	`VK_0` VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39)
`static int`	`VK_1`
`static int`	`VK_2`
`static int`	`VK_3`
`static int`	`VK_4`
`static int`	`VK_5`
`static int`	`VK_6`
`static int`	`VK_7`
`static int`	`VK_8`
`static int`	`VK_9`
`static int`	`VK_A` VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A)
`static int`	`VK_ACCEPT` Constant for the Accept or Commit function key.
`static int`	`VK_ADD`
`static int`	`VK_AGAIN`
`static int`	`VK_ALL_CANDIDATES` Constant for the All Candidates function key.
`static int`	`VK_ALPHANUMERIC` Constant for the Alphanumeric function key.
`static int`	`VK_ALT`
`static int`	`VK_ALT_GRAPH` Constant for the AltGraph function key.
`static int`	`VK_AMPERSAND`
`static int`	`VK_ASTERISK`
`static int`	`VK_AT` Constant for the "@" key.
`static int`	`VK_B`
`static int`	`VK_BACK_QUOTE`
`static int`	`VK_BACK_SLASH`
`static int`	`VK_BACK_SPACE`
`static int`	`VK_BRACELEFT`
`static int`	`VK_BRACERIGHT`
`static int`	`VK_C`
`static int`	`VK_CANCEL`
`static int`	`VK_CAPS_LOCK`
`static int`	`VK_CIRCUMFLEX` Constant for the "^" key.
`static int`	`VK_CLEAR`
`static int`	`VK_CLOSE_BRACKET`
`static int`	`VK_CODE_INPUT` Constant for the Code Input function key.
`static int`	`VK_COLON` Constant for the ":" key.
`static int`	`VK_COMMA`
`static int`	`VK_COMPOSE` Constant for the Compose function key.
`static int`	`VK_CONTROL`
`static int`	`VK_CONVERT` Constant for the Convert function key.
`static int`	`VK_COPY`
`static int`	`VK_CUT`
`static int`	`VK_D`
`static int`	`VK_DEAD_ABOVEDOT`
`static int`	`VK_DEAD_ABOVERING`
`static int`	`VK_DEAD_ACUTE`
`static int`	`VK_DEAD_BREVE`
`static int`	`VK_DEAD_CARON`
`static int`	`VK_DEAD_CEDILLA`
`static int`	`VK_DEAD_CIRCUMFLEX`
`static int`	`VK_DEAD_DIAERESIS`
`static int`	`VK_DEAD_DOUBLEACUTE`
`static int`	`VK_DEAD_GRAVE`
`static int`	`VK_DEAD_IOTA`
`static int`	`VK_DEAD_MACRON`
`static int`	`VK_DEAD_OGONEK`
`static int`	`VK_DEAD_SEMIVOICED_SOUND`
`static int`	`VK_DEAD_TILDE`
`static int`	`VK_DEAD_VOICED_SOUND`
`static int`	`VK_DECIMAL`
`static int`	`VK_DELETE`
`static int`	`VK_DIVIDE`
`static int`	`VK_DOLLAR` Constant for the "$" key.
`static int`	`VK_DOWN` Constant for the non-numpad down arrow key.
`static int`	`VK_E`
`static int`	`VK_END`
`static int`	`VK_ENTER`
`static int`	`VK_EQUALS`
`static int`	`VK_ESCAPE`
`static int`	`VK_EURO_SIGN` Constant for the Euro currency sign key.
`static int`	`VK_EXCLAMATION_MARK` Constant for the "!" key.
`static int`	`VK_F`
`static int`	`VK_F1` Constant for the F1 function key.
`static int`	`VK_F10` Constant for the F10 function key.
`static int`	`VK_F11` Constant for the F11 function key.
`static int`	`VK_F12` Constant for the F12 function key.
`static int`	`VK_F13` Constant for the F13 function key.
`static int`	`VK_F14` Constant for the F14 function key.
`static int`	`VK_F15` Constant for the F15 function key.
`static int`	`VK_F16` Constant for the F16 function key.
`static int`	`VK_F17` Constant for the F17 function key.
`static int`	`VK_F18` Constant for the F18 function key.
`static int`	`VK_F19` Constant for the F19 function key.
`static int`	`VK_F2` Constant for the F2 function key.
`static int`	`VK_F20` Constant for the F20 function key.
`static int`	`VK_F21` Constant for the F21 function key.
`static int`	`VK_F22` Constant for the F22 function key.
`static int`	`VK_F23` Constant for the F23 function key.
`static int`	`VK_F24` Constant for the F24 function key.
`static int`	`VK_F3` Constant for the F3 function key.
`static int`	`VK_F4` Constant for the F4 function key.
`static int`	`VK_F5` Constant for the F5 function key.
`static int`	`VK_F6` Constant for the F6 function key.
`static int`	`VK_F7` Constant for the F7 function key.
`static int`	`VK_F8` Constant for the F8 function key.
`static int`	`VK_F9` Constant for the F9 function key.
`static int`	`VK_FINAL`
`static int`	`VK_FIND`
`static int`	`VK_FULL_WIDTH` Constant for the Full-Width Characters function key.
`static int`	`VK_G`
`static int`	`VK_GREATER`
`static int`	`VK_H`
`static int`	`VK_HALF_WIDTH` Constant for the Half-Width Characters function key.
`static int`	`VK_HELP`
`static int`	`VK_HIRAGANA` Constant for the Hiragana function key.
`static int`	`VK_HOME`
`static int`	`VK_I`
`static int`	`VK_INPUT_METHOD_ON_OFF` Constant for the input method on/off key.
`static int`	`VK_INSERT`
`static int`	`VK_INVERTED_EXCLAMATION_MARK` Constant for the inverted exclamation mark key.
`static int`	`VK_J`
`static int`	`VK_JAPANESE_HIRAGANA` Constant for the Japanese-Hiragana function key.
`static int`	`VK_JAPANESE_KATAKANA` Constant for the Japanese-Katakana function key.
`static int`	`VK_JAPANESE_ROMAN` Constant for the Japanese-Roman function key.
`static int`	`VK_K`
`static int`	`VK_KANA`
`static int`	`VK_KANA_LOCK` Constant for the locking Kana function key.
`static int`	`VK_KANJI`
`static int`	`VK_KATAKANA` Constant for the Katakana function key.
`static int`	`VK_KP_DOWN` Constant for the numeric keypad down arrow key.
`static int`	`VK_KP_LEFT` Constant for the numeric keypad left arrow key.
`static int`	`VK_KP_RIGHT` Constant for the numeric keypad right arrow key.
`static int`	`VK_KP_UP` Constant for the numeric keypad up arrow key.
`static int`	`VK_L`
`static int`	`VK_LEFT` Constant for the non-numpad left arrow key.
`static int`	`VK_LEFT_PARENTHESIS` Constant for the "(" key.
`static int`	`VK_LESS`
`static int`	`VK_M`
`static int`	`VK_META`
`static int`	`VK_MINUS` Constant for the "-" key.
`static int`	`VK_MODECHANGE`
`static int`	`VK_MULTIPLY`
`static int`	`VK_N`
`static int`	`VK_NONCONVERT` Constant for the Don't Convert function key.
`static int`	`VK_NUM_LOCK`
`static int`	`VK_NUMBER_SIGN` Constant for the "#" key.
`static int`	`VK_NUMPAD0`
`static int`	`VK_NUMPAD1`
`static int`	`VK_NUMPAD2`
`static int`	`VK_NUMPAD3`
`static int`	`VK_NUMPAD4`
`static int`	`VK_NUMPAD5`
`static int`	`VK_NUMPAD6`
`static int`	`VK_NUMPAD7`
`static int`	`VK_NUMPAD8`
`static int`	`VK_NUMPAD9`
`static int`	`VK_O`
`static int`	`VK_OPEN_BRACKET`
`static int`	`VK_P`
`static int`	`VK_PAGE_DOWN`
`static int`	`VK_PAGE_UP`
`static int`	`VK_PASTE`
`static int`	`VK_PAUSE`
`static int`	`VK_PERIOD`
`static int`	`VK_PLUS` Constant for the "+" key.
`static int`	`VK_PREVIOUS_CANDIDATE` Constant for the Previous Candidate function key.
`static int`	`VK_PRINTSCREEN`
`static int`	`VK_PROPS`
`static int`	`VK_Q`
`static int`	`VK_QUOTE`
`static int`	`VK_QUOTEDBL`
`static int`	`VK_R`
`static int`	`VK_RIGHT` Constant for the non-numpad right arrow key.
`static int`	`VK_RIGHT_PARENTHESIS` Constant for the ")" key.
`static int`	`VK_ROMAN_CHARACTERS` Constant for the Roman Characters function key.
`static int`	`VK_S`
`static int`	`VK_SCROLL_LOCK`
`static int`	`VK_SEMICOLON`
`static int`	`VK_SEPARATER` This constant is obsolete, and is included only for backwards compatibility.
`static int`	`VK_SEPARATOR` Constant for the Numpad Separator key.
`static int`	`VK_SHIFT`
`static int`	`VK_SLASH`
`static int`	`VK_SPACE`
`static int`	`VK_STOP`
`static int`	`VK_SUBTRACT`
`static int`	`VK_T`
`static int`	`VK_TAB`
`static int`	`VK_U`
`static int`	`VK_UNDEFINED` This value is used to indicate that the keyCode is unknown.
`static int`	`VK_UNDERSCORE` Constant for the "_" key.
`static int`	`VK_UNDO`
`static int`	`VK_UP` Constant for the non-numpad up arrow key.
`static int`	`VK_V`
`static int`	`VK_W`
`static int`	`VK_X`
`static int`	`VK_Y`
`static int`	`VK_Z`

Constructor Summary
`KeyEvent(Component source, int id, long when, int modifiers, int keyCode)` Deprecated. as of JDK1.1
`KeyEvent(Component source, int id, long when, int modifiers, int keyCode, char keyChar)` Constructs a `KeyEvent` object.
`KeyEvent(Component source, int id, long when, int modifiers, int keyCode, char keyChar, int keyLocation)`

Method Summary
`char`	`getKeyChar()` Returns the character associated with the key in this event.
`int`	`getKeyCode()` Returns the integer keyCode associated with the key in this event.
`int`	`getKeyLocation()` Returns the location of the key that originated this key event.
`static String`	`getKeyModifiersText(int modifiers)` Returns a String describing the modifier key(s), such as "Shift", or "Ctrl+Shift".
`static String`	`getKeyText(int keyCode)` Returns a String describing the keyCode, such as "HOME", "F1" or "A".
`boolean`	`isActionKey()` Returns whether the key in this event is an "action" key.
`String`	`paramString()` Returns a parameter string identifying this event.
`void`	`setKeyChar(char keyChar)` Set the keyChar value to indicate a logical character.
`void`	`setKeyCode(int keyCode)` Set the keyCode value to indicate a physical key.
`void`	`setModifiers(int modifiers)` Deprecated. as of JDK1.1.4