Converting a KeyStroke to a String : KeyStroke « Swing Event « Java Tutorial

1. Java Tutorial
2. Swing Event
3. KeyStroke

import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

import javax.swing.Action;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;

public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton("button");
    InputMap map = component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    list(map, map.keys());
    list(map, map.allKeys());
  }

  static void list(InputMap map, KeyStroke[] keys) {
    if (keys == null) {
      return;
    }
    for (int i = 0; i < keys.length; i++) {
      keyStroke2String(keys[i]);
      while (map.get(keys[i]) == null) {
        map = map.getParent();
      }
      if (map.get(keys[i]) instanceof String) {
        String actionName = (String) map.get(keys[i]);
      } else {
        Action action = (Action) map.get(keys[i]);
      }
    }
  }

  static void keyStroke2String(KeyStroke key) {
    int m = key.getModifiers();

    if ((m & (InputEvent.SHIFT_DOWN_MASK | InputEvent.SHIFT_MASK)) != 0) {
      System.out.println("shift ");
    }
    if ((m & (InputEvent.CTRL_DOWN_MASK | InputEvent.CTRL_MASK)) != 0) {
      System.out.println("ctrl ");
    }
    if ((m & (InputEvent.META_DOWN_MASK | InputEvent.META_MASK)) != 0) {
      System.out.println("meta ");
    }
    if ((m & (InputEvent.ALT_DOWN_MASK | InputEvent.ALT_MASK)) != 0) {
      System.out.println("alt ");
    }
    if ((m & (InputEvent.BUTTON1_DOWN_MASK | InputEvent.BUTTON1_MASK)) != 0) {
      System.out.println("button1 ");
    }
    if ((m & (InputEvent.BUTTON2_DOWN_MASK | InputEvent.BUTTON2_MASK)) != 0) {
      System.out.println("button2 ");
    }
    if ((m & (InputEvent.BUTTON3_DOWN_MASK | InputEvent.BUTTON3_MASK)) != 0) {
      System.out.println("button3 ");
    }
    switch (key.getKeyEventType()) {
    case KeyEvent.KEY_TYPED:
      System.out.println("typed ");
      System.out.println(key.getKeyChar() + " ");
      break;
    case KeyEvent.KEY_PRESSED:
      System.out.println("pressed ");
      System.out.println(getKeyText(key.getKeyCode()) + " ");
      break;
    case KeyEvent.KEY_RELEASED:
      System.out.println("released ");
      System.out.println(getKeyText(key.getKeyCode()) + " ");
      break;
    default:
      System.out.println("unknown-event-type ");
      break;
    }
  }

  static String getKeyText(int keyCode) {
    if (keyCode >= KeyEvent.VK_0 && keyCode <= KeyEvent.VK_9 || keyCode >= KeyEvent.VK_A
        && keyCode <= KeyEvent.VK_Z) {
      return String.valueOf((char) keyCode);
    }
    switch (keyCode) {
    case KeyEvent.VK_COMMA:
      return "COMMA";
    case KeyEvent.VK_PERIOD:
      return "PERIOD";
    case KeyEvent.VK_SLASH:
      return "SLASH";
    case KeyEvent.VK_SEMICOLON:
      return "SEMICOLON";
    case KeyEvent.VK_EQUALS:
      return "EQUALS";
    case KeyEvent.VK_OPEN_BRACKET:
      return "OPEN_BRACKET";
    case KeyEvent.VK_BACK_SLASH:
      return "BACK_SLASH";
    case KeyEvent.VK_CLOSE_BRACKET:
      return "CLOSE_BRACKET";
    case KeyEvent.VK_ENTER:
      return "ENTER";
    case KeyEvent.VK_BACK_SPACE:
      return "BACK_SPACE";
    case KeyEvent.VK_TAB:
      return "TAB";
    case KeyEvent.VK_CANCEL:
      return "CANCEL";
    case KeyEvent.VK_CLEAR:
      return "CLEAR";
    case KeyEvent.VK_SHIFT:
      return "SHIFT";
    case KeyEvent.VK_CONTROL:
      return "CONTROL";
    case KeyEvent.VK_ALT:
      return "ALT";
    case KeyEvent.VK_PAUSE:
      return "PAUSE";
    case KeyEvent.VK_CAPS_LOCK:
      return "CAPS_LOCK";
    case KeyEvent.VK_ESCAPE:
      return "ESCAPE";
    case KeyEvent.VK_SPACE:
      return "SPACE";
    case KeyEvent.VK_PAGE_UP:
      return "PAGE_UP";
    case KeyEvent.VK_PAGE_DOWN:
      return "PAGE_DOWN";
    case KeyEvent.VK_END:
      return "END";
    case KeyEvent.VK_HOME:
      return "HOME";
    case KeyEvent.VK_LEFT:
      return "LEFT";
    case KeyEvent.VK_UP:
      return "UP";
    case KeyEvent.VK_RIGHT:
      return "RIGHT";
    case KeyEvent.VK_DOWN:
      return "DOWN";
    case KeyEvent.VK_MULTIPLY:
      return "MULTIPLY";
    case KeyEvent.VK_ADD:
      return "ADD";
    case KeyEvent.VK_SEPARATOR:
      return "SEPARATOR";
    case KeyEvent.VK_SUBTRACT:
      return "SUBTRACT";
    case KeyEvent.VK_DECIMAL:
      return "DECIMAL";
    case KeyEvent.VK_DIVIDE:
      return "DIVIDE";
    case KeyEvent.VK_DELETE:
      return "DELETE";
    case KeyEvent.VK_NUM_LOCK:
      return "NUM_LOCK";
    case KeyEvent.VK_SCROLL_LOCK:
      return "SCROLL_LOCK";
    case KeyEvent.VK_F1:
      return "F1";
    case KeyEvent.VK_F2:
      return "F2";
    case KeyEvent.VK_F3:
      return "F3";
    case KeyEvent.VK_F4:
      return "F4";
    case KeyEvent.VK_F5:
      return "F5";
    case KeyEvent.VK_F6:
      return "F6";
    case KeyEvent.VK_F7:
      return "F7";
    case KeyEvent.VK_F8:
      return "F8";
    case KeyEvent.VK_F9:
      return "F9";
    case KeyEvent.VK_F10:
      return "F10";
    case KeyEvent.VK_F11:
      return "F11";
    case KeyEvent.VK_F12:
      return "F12";
    case KeyEvent.VK_F13:
      return "F13";
    case KeyEvent.VK_F14:
      return "F14";
    case KeyEvent.VK_F15:
      return "F15";
    case KeyEvent.VK_F16:
      return "F16";
    case KeyEvent.VK_F17:
      return "F17";
    case KeyEvent.VK_F18:
      return "F18";
    case KeyEvent.VK_F19:
      return "F19";
    case KeyEvent.VK_F20:
      return "F20";
    case KeyEvent.VK_F21:
      return "F21";
    case KeyEvent.VK_F22:
      return "F22";
    case KeyEvent.VK_F23:
      return "F23";
    case KeyEvent.VK_F24:
      return "F24";
    case KeyEvent.VK_PRINTSCREEN:
      return "PRINTSCREEN";
    case KeyEvent.VK_INSERT:
      return "INSERT";
    case KeyEvent.VK_HELP:
      return "HELP";
    case KeyEvent.VK_META:
      return "META";
    case KeyEvent.VK_BACK_QUOTE:
      return "BACK_QUOTE";
    case KeyEvent.VK_QUOTE:
      return "QUOTE";
    case KeyEvent.VK_KP_UP:
      return "KP_UP";
    case KeyEvent.VK_KP_DOWN:
      return "KP_DOWN";
    case KeyEvent.VK_KP_LEFT:
      return "KP_LEFT";
    case KeyEvent.VK_KP_RIGHT:
      return "KP_RIGHT";
    case KeyEvent.VK_DEAD_GRAVE:
      return "DEAD_GRAVE";
    case KeyEvent.VK_DEAD_ACUTE:
      return "DEAD_ACUTE";
    case KeyEvent.VK_DEAD_CIRCUMFLEX:
      return "DEAD_CIRCUMFLEX";
    case KeyEvent.VK_DEAD_TILDE:
      return "DEAD_TILDE";
    case KeyEvent.VK_DEAD_MACRON:
      return "DEAD_MACRON";
    case KeyEvent.VK_DEAD_BREVE:
      return "DEAD_BREVE";
    case KeyEvent.VK_DEAD_ABOVEDOT:
      return "DEAD_ABOVEDOT";
    case KeyEvent.VK_DEAD_DIAERESIS:
      return "DEAD_DIAERESIS";
    case KeyEvent.VK_DEAD_ABOVERING:
      return "DEAD_ABOVERING";
    case KeyEvent.VK_DEAD_DOUBLEACUTE:
      return "DEAD_DOUBLEACUTE";
    case KeyEvent.VK_DEAD_CARON:
      return "DEAD_CARON";
    case KeyEvent.VK_DEAD_CEDILLA:
      return "DEAD_CEDILLA";
    case KeyEvent.VK_DEAD_OGONEK:
      return "DEAD_OGONEK";
    case KeyEvent.VK_DEAD_IOTA:
      return "DEAD_IOTA";
    case KeyEvent.VK_DEAD_VOICED_SOUND:
      return "DEAD_VOICED_SOUND";
    case KeyEvent.VK_DEAD_SEMIVOICED_SOUND:
      return "DEAD_SEMIVOICED_SOUND";
    case KeyEvent.VK_AMPERSAND:
      return "AMPERSAND";
    case KeyEvent.VK_ASTERISK:
      return "ASTERISK";
    case KeyEvent.VK_QUOTEDBL:
      return "QUOTEDBL";
    case KeyEvent.VK_LESS:
      return "LESS";
    case KeyEvent.VK_GREATER:
      return "GREATER";
    case KeyEvent.VK_BRACELEFT:
      return "BRACELEFT";
    case KeyEvent.VK_BRACERIGHT:
      return "BRACERIGHT";
    case KeyEvent.VK_AT:
      return "AT";
    case KeyEvent.VK_COLON:
      return "COLON";
    case KeyEvent.VK_CIRCUMFLEX:
      return "CIRCUMFLEX";
    case KeyEvent.VK_DOLLAR:
      return "DOLLAR";
    case KeyEvent.VK_EURO_SIGN:
      return "EURO_SIGN";
    case KeyEvent.VK_EXCLAMATION_MARK:
      return "EXCLAMATION_MARK";
    case KeyEvent.VK_INVERTED_EXCLAMATION_MARK:
      return "INVERTED_EXCLAMATION_MARK";
    case KeyEvent.VK_LEFT_PARENTHESIS:
      return "LEFT_PARENTHESIS";
    case KeyEvent.VK_NUMBER_SIGN:
      return "NUMBER_SIGN";
    case KeyEvent.VK_MINUS:
      return "MINUS";
    case KeyEvent.VK_PLUS:
      return "PLUS";
    case KeyEvent.VK_RIGHT_PARENTHESIS:
      return "RIGHT_PARENTHESIS";
    case KeyEvent.VK_UNDERSCORE:
      return "UNDERSCORE";
    case KeyEvent.VK_FINAL:
      return "FINAL";
    case KeyEvent.VK_CONVERT:
      return "CONVERT";
    case KeyEvent.VK_NONCONVERT:
      return "NONCONVERT";
    case KeyEvent.VK_ACCEPT:
      return "ACCEPT";
    case KeyEvent.VK_MODECHANGE:
      return "MODECHANGE";
    case KeyEvent.VK_KANA:
      return "KANA";
    case KeyEvent.VK_KANJI:
      return "KANJI";
    case KeyEvent.VK_ALPHANUMERIC:
      return "ALPHANUMERIC";
    case KeyEvent.VK_KATAKANA:
      return "KATAKANA";
    case KeyEvent.VK_HIRAGANA:
      return "HIRAGANA";
    case KeyEvent.VK_FULL_WIDTH:
      return "FULL_WIDTH";
    case KeyEvent.VK_HALF_WIDTH:
      return "HALF_WIDTH";
    case KeyEvent.VK_ROMAN_CHARACTERS:
      return "ROMAN_CHARACTERS";
    case KeyEvent.VK_ALL_CANDIDATES:
      return "ALL_CANDIDATES";
    case KeyEvent.VK_PREVIOUS_CANDIDATE:
      return "PREVIOUS_CANDIDATE";
    case KeyEvent.VK_CODE_INPUT:
      return "CODE_INPUT";
    case KeyEvent.VK_JAPANESE_KATAKANA:
      return "JAPANESE_KATAKANA";
    case KeyEvent.VK_JAPANESE_HIRAGANA:
      return "JAPANESE_HIRAGANA";
    case KeyEvent.VK_JAPANESE_ROMAN:
      return "JAPANESE_ROMAN";
    case KeyEvent.VK_KANA_LOCK:
      return "KANA_LOCK";
    case KeyEvent.VK_INPUT_METHOD_ON_OFF:
      return "INPUT_METHOD_ON_OFF";

    case KeyEvent.VK_AGAIN:
      return "AGAIN";
    case KeyEvent.VK_UNDO:
      return "UNDO";
    case KeyEvent.VK_COPY:
      return "COPY";
    case KeyEvent.VK_PASTE:
      return "PASTE";
    case KeyEvent.VK_CUT:
      return "CUT";
    case KeyEvent.VK_FIND:
      return "FIND";
    case KeyEvent.VK_PROPS:
      return "PROPS";
    case KeyEvent.VK_STOP:
      return "STOP";

    case KeyEvent.VK_COMPOSE:
      return "COMPOSE";
    case KeyEvent.VK_ALT_GRAPH:
      return "ALT_GRAPH";
    }

    if (keyCode >= KeyEvent.VK_NUMPAD0 && keyCode <= KeyEvent.VK_NUMPAD9) {
      char c = (char) (keyCode - KeyEvent.VK_NUMPAD0 + '0');
      return "NUMPAD" + c;
    }

    return "unknown(0x" + Integer.toString(keyCode, 16) + ")";
  }
}

15.22.KeyStroke
	15.22.1.	KeyStroke Class
	15.22.2.	Creating a KeyStroke
	15.22.3.	Registering a KeyStroke
	15.22.4.	KeyStroke Sample: VKEnter
	15.22.5.	KeyStroke Sample: function key and Shift key
	15.22.6.	KeyStroke Sample: Space key
	15.22.7.	List keystrokes in the WHEN_ANCESTOR_OF_FOCUSED_COMPONENT input map of the component
	15.22.8.	List keystrokes in the WHEN_IN_FOCUSED_WINDOW input map of the component
	15.22.9.	Converting a KeyStroke to a String
	15.22.10.	Creating a KeyStroke and Binding It to an Action
	15.22.11.	KeyStroke.getKeyStroke('F2')
	15.22.12.	Overriding - key
	15.22.13.	Override $ key
	15.22.14.	Overriding space key
	15.22.15.	Set java.awt.Container.getFocusTraversalKeys(int id)
	15.22.16.	Activating a Keystroke When Any Component in the Window Has Focus
	15.22.17.	Remove all forward focus traversal keys for the application
	15.22.18.	Remove all backward focus traversal keys for the application
	15.22.19.	Activating a Keystroke When Any Child Component Has Focus
	15.22.20.	Bind a keystroke to shift-space
	15.22.21.	KeyStroke to String
	15.22.22.	Get Key Text