/* * Swing version */ import javax.swing.*; import java.awt.event.*; import java.awt.BorderLayout; import java.awt.Dimension; public class KeyEventDemo extends JApplet implements KeyListener, ActionListener { JTextArea displayArea; JTextField typingArea; static final String newline = "\n"; public void init() { JButton button = new JButton("Clear"); button.addActionListener(this); typingArea = new JTextField(20); typingArea.addKeyListener(this); displayArea = new JTextArea(); displayArea.setEditable(false); JScrollPane scrollPane = new JScrollPane(displayArea); scrollPane.setPreferredSize(new Dimension(375, 125)); JPanel contentPane = new JPanel(); contentPane.setLayout(new BorderLayout()); contentPane.add(typingArea, BorderLayout.NORTH); contentPane.add(scrollPane, BorderLayout.CENTER); contentPane.add(button, BorderLayout.SOUTH); setContentPane(contentPane); } /** Handle the key typed event from the text field. */ public void keyTyped(KeyEvent e) { displayInfo(e, 0, "KEY TYPED: "); } /** Handle the key pressed event from the text field. */ public void keyPressed(KeyEvent e) { displayInfo(e, 1, "KEY PRESSED: "); } /** Handle the key released event from the text field. */ public void keyReleased(KeyEvent e) { displayInfo(e, 2, "KEY RELEASED: "); } /** Handle the button click. */ public void actionPerformed(ActionEvent e) { //Clear the text components. displayArea.setText(""); typingArea.setText(""); //Return the focus to the typing area. typingArea.requestFocus(); } /* * We have to jump through some hoops to avoid * trying to print non-printing characters * such as Shift. (Not only do they not print, * but if you put them in a String, the characters * afterward won't show up in the text area.) */ protected void displayInfo(KeyEvent e, int phase, String s){ String charString, keyCodeString, modString, tmpString; char c = e.getKeyChar(); int keyCode = e.getKeyCode(); int modifiers = e.getModifiers(); if (Character.isISOControl(c)) { charString = "key character = " + "(an unprintable control character)"; } else { charString = "key character = '" + c + "'"; } charString += "[" + Character.getNumericValue(c) + "]"; modString = "modifiers = " + modifiers; tmpString = KeyEvent.getKeyModifiersText(modifiers); if (tmpString.length() > 0) { modString += " (" + tmpString + ")"; } else { modString += " (no modifiers)"; } convertLocation(e.getKeyLocation()); displayArea.append(s + newline + " " + charString + newline + " " + keyCodeString + newline + " " + modString + newline); } public String convertKeyCode(int keyCode) { switch (keyCode) { case KeyEvent.VK_ENTER: return "VK_ENTER"; case KeyEvent.VK_BACK_SPACE: return "VK_BACK_SPACE"; case KeyEvent.VK_TAB: return "VK_TAB"; case KeyEvent.VK_CANCEL: return "VK_CANCEL"; case KeyEvent.VK_CLEAR: return "VK_CLEAR"; case KeyEvent.VK_SHIFT: return "VK_SHIFT"; case KeyEvent.VK_CONTROL: return "VK_CONTROL"; case KeyEvent.VK_ALT: return "VK_ALT"; case KeyEvent.VK_PAUSE: return "VK_PAUSE"; case KeyEvent.VK_CAPS_LOCK: return "VK_CAPS_LOCK"; case KeyEvent.VK_ESCAPE: return "VK_ESCAPE"; case KeyEvent.VK_SPACE: return "VK_SPACE"; case KeyEvent.VK_PAGE_UP: return "VK_PAGE_UP"; case KeyEvent.VK_PAGE_DOWN: return "VK_PAGE_DOWN"; case KeyEvent.VK_END: return "VK_END"; case KeyEvent.VK_HOME: return "VK_HOME"; case KeyEvent.VK_LEFT: return "VK_LEFT"; case KeyEvent.VK_UP: return "VK_UP"; case KeyEvent.VK_RIGHT: return "VK_RIGHT"; case KeyEvent.VK_DOWN: return "VK_DOWN"; case KeyEvent.VK_COMMA: return "VK_COMMA"; case KeyEvent.VK_MINUS: return "VK_MINUS"; case KeyEvent.VK_PERIOD: return "VK_PERIOD"; case KeyEvent.VK_SLASH: return "VK_SLASH"; case KeyEvent.VK_0: return "VK_0"; case KeyEvent.VK_1: return "VK_1"; case KeyEvent.VK_2: return "VK_2"; case KeyEvent.VK_3: return "VK_3"; case KeyEvent.VK_4: return "VK_4"; case KeyEvent.VK_5: return "VK_5"; case KeyEvent.VK_6: return "VK_6"; case KeyEvent.VK_7: return "VK_7"; case KeyEvent.VK_8: return "VK_8"; case KeyEvent.VK_9: return "VK_9"; case KeyEvent.VK_SEMICOLON: return "VK_SEMICOLON"; case KeyEvent.VK_EQUALS: return "VK_EQUALS"; case KeyEvent.VK_A: return "VK_A"; case KeyEvent.VK_B: return "VK_B"; case KeyEvent.VK_C: return "VK_C"; case KeyEvent.VK_D: return "VK_D"; case KeyEvent.VK_E: return "VK_E"; case KeyEvent.VK_F: return "VK_F"; case KeyEvent.VK_G: return "VK_G"; case KeyEvent.VK_H: return "VK_H"; case KeyEvent.VK_I: return "VK_I"; case KeyEvent.VK_J: return "VK_J"; case KeyEvent.VK_K: return "VK_K"; case KeyEvent.VK_L: return "VK_L"; case KeyEvent.VK_M: return "VK_M"; case KeyEvent.VK_N: return "VK_N"; case KeyEvent.VK_O: return "VK_O"; case KeyEvent.VK_P: return "VK_P"; case KeyEvent.VK_Q: return "VK_Q"; case KeyEvent.VK_R: return "VK_R"; case KeyEvent.VK_S: return "VK_S"; case KeyEvent.VK_T: return "VK_T"; case KeyEvent.VK_U: return "VK_U"; case KeyEvent.VK_V: return "VK_V"; case KeyEvent.VK_W: return "VK_W"; case KeyEvent.VK_X: return "VK_X"; case KeyEvent.VK_Y: return "VK_Y"; case KeyEvent.VK_Z: return "VK_Z"; case KeyEvent.VK_OPEN_BRACKET: return "VK_OPEN_BRACKET"; case KeyEvent.VK_BACK_SLASH: return "VK_BACK_SLASH"; case KeyEvent.VK_CLOSE_BRACKET: return "VK_CLOSE_BRACKET"; case KeyEvent.VK_NUMPAD0: return "VK_NUMPAD0"; case KeyEvent.VK_NUMPAD1: return "VK_NUMPAD1"; case KeyEvent.VK_NUMPAD2: return "VK_NUMPAD2"; case KeyEvent.VK_NUMPAD3: return "VK_NUMPAD3"; case KeyEvent.VK_NUMPAD4: return "VK_NUMPAD4"; case KeyEvent.VK_NUMPAD5: return "VK_NUMPAD5"; case KeyEvent.VK_NUMPAD6: return "VK_NUMPAD6"; case KeyEvent.VK_NUMPAD7: return "VK_NUMPAD7"; case KeyEvent.VK_NUMPAD8: return "VK_NUMPAD8"; case KeyEvent.VK_NUMPAD9: return "VK_NUMPAD9"; case KeyEvent.VK_MULTIPLY: return "VK_MULTIPLY"; case KeyEvent.VK_ADD: return "VK_ADD"; case KeyEvent.VK_SEPARATER: return "VK_SEPARATER"; case KeyEvent.VK_SUBTRACT: return "VK_SUBTRACT"; case KeyEvent.VK_DECIMAL: return "VK_DECIMAL"; case KeyEvent.VK_DIVIDE: return "VK_DIVIDE"; case KeyEvent.VK_DELETE: return "VK_DELETE"; case KeyEvent.VK_NUM_LOCK: return "VK_NUM_LOCK"; case KeyEvent.VK_SCROLL_LOCK: return "VK_SCROLL_LOCK"; case KeyEvent.VK_F1: return "VK_F1"; case KeyEvent.VK_F2: return "VK_F2"; case KeyEvent.VK_F3: return "VK_F3"; case KeyEvent.VK_F4: return "VK_F4"; case KeyEvent.VK_F5: return "VK_F5"; case KeyEvent.VK_F6: return "VK_F6"; case KeyEvent.VK_F7: return "VK_F7"; case KeyEvent.VK_F8: return "VK_F8"; case KeyEvent.VK_F9: return "VK_F9"; case KeyEvent.VK_F10: return "VK_F10"; case KeyEvent.VK_F11: return "VK_F11"; case KeyEvent.VK_F12: return "VK_F12"; case KeyEvent.VK_F13: return "VK_F13"; case KeyEvent.VK_F14: return "VK_F14"; case KeyEvent.VK_F15: return "VK_F15"; case KeyEvent.VK_F16: return "VK_F16"; case KeyEvent.VK_F17: return "VK_F17"; case KeyEvent.VK_F18: return "VK_F18"; case KeyEvent.VK_F19: return "VK_F19"; case KeyEvent.VK_F20: return "VK_F20"; case KeyEvent.VK_F21: return "VK_F21"; case KeyEvent.VK_F22: return "VK_F22"; case KeyEvent.VK_F23: return "VK_F23"; case KeyEvent.VK_F24: return "VK_F24"; case KeyEvent.VK_PRINTSCREEN: return "VK_PRINTSCREEN"; case KeyEvent.VK_INSERT: return "VK_INSERT"; case KeyEvent.VK_HELP: return "VK_HELP"; case KeyEvent.VK_META: return "VK_META"; case KeyEvent.VK_BACK_QUOTE: return "VK_BACK_QUOTE"; case KeyEvent.VK_QUOTE: return "VK_QUOTE"; case KeyEvent.VK_KP_UP: return "VK_KP_UP"; case KeyEvent.VK_KP_DOWN: return "VK_KP_DOWN"; case KeyEvent.VK_KP_LEFT: return "VK_KP_LEFT"; case KeyEvent.VK_KP_RIGHT: return "VK_KP_RIGHT"; case KeyEvent.VK_DEAD_GRAVE: return "VK_DEAD_GRAVE"; case KeyEvent.VK_DEAD_ACUTE: return "VK_DEAD_ACUTE"; case KeyEvent.VK_DEAD_CIRCUMFLEX: return "VK_DEAD_CIRCUMFLEX"; case KeyEvent.VK_DEAD_TILDE: return "VK_DEAD_TILDE"; case KeyEvent.VK_DEAD_MACRON: return "VK_DEAD_MACRON"; case KeyEvent.VK_DEAD_BREVE: return "VK_DEAD_BREVE"; case KeyEvent.VK_DEAD_ABOVEDOT: return "VK_DEAD_ABOVEDOT"; case KeyEvent.VK_DEAD_DIAERESIS: return "VK_DEAD_DIAERESIS"; case KeyEvent.VK_DEAD_ABOVERING: return "VK_DEAD_ABOVERING"; case KeyEvent.VK_DEAD_DOUBLEACUTE: return "VK_DEAD_DOUBLEACUTE"; case KeyEvent.VK_DEAD_CARON: return "VK_DEAD_CARON"; case KeyEvent.VK_DEAD_CEDILLA: return "VK_DEAD_CEDILLA"; case KeyEvent.VK_DEAD_OGONEK: return "VK_DEAD_OGONEK"; case KeyEvent.VK_DEAD_IOTA: return "VK_DEAD_IOTA"; case KeyEvent.VK_DEAD_VOICED_SOUND: return "VK_DEAD_VOICED_SOUND"; case KeyEvent.VK_DEAD_SEMIVOICED_SOUND: return "VK_DEAD_SEMIVOICED_SOUND"; case KeyEvent.VK_AMPERSAND: return "VK_AMPERSAND"; case KeyEvent.VK_ASTERISK: return "VK_ASTERISK"; case KeyEvent.VK_QUOTEDBL: return "VK_QUOTEDBL"; case KeyEvent.VK_LESS: return "VK_LESS"; case KeyEvent.VK_GREATER: return "VK_GREATER"; case KeyEvent.VK_BRACELEFT: return "VK_BRACELEFT"; case KeyEvent.VK_BRACERIGHT: return "VK_BRACERIGHT"; case KeyEvent.VK_AT: return "VK_AT"; case KeyEvent.VK_COLON: return "VK_COLON"; case KeyEvent.VK_CIRCUMFLEX: return "VK_CIRCUMFLEX"; case KeyEvent.VK_DOLLAR: return "VK_DOLLAR"; case KeyEvent.VK_EURO_SIGN: return "VK_EURO_SIGN"; case KeyEvent.VK_EXCLAMATION_MARK: return "VK_EXCLAMATION_MARK"; case KeyEvent.VK_INVERTED_EXCLAMATION_MARK: return "VK_INVERTED_EXCLAMATION_MARK"; case KeyEvent.VK_LEFT_PARENTHESIS: return "VK_LEFT_PARENTHESIS"; case KeyEvent.VK_NUMBER_SIGN: return "VK_NUMBER_SIGN"; case KeyEvent.VK_PLUS: return "VK_PLUS"; case KeyEvent.VK_RIGHT_PARENTHESIS: return "VK_RIGHT_PARENTHESIS"; case KeyEvent.VK_UNDERSCORE: return "VK_UNDERSCORE"; case KeyEvent.VK_FINAL: return "VK_FINAL"; case KeyEvent.VK_CONVERT: return "VK_CONVERT"; case KeyEvent.VK_NONCONVERT: return "VK_NONCONVERT"; case KeyEvent.VK_ACCEPT: return "VK_ACCEPT"; case KeyEvent.VK_MODECHANGE: return "VK_MODECHANGE"; case KeyEvent.VK_KANA: return "VK_KANA"; case KeyEvent.VK_KANJI: return "VK_KANJI"; case KeyEvent.VK_ALPHANUMERIC: return "VK_ALPHANUMERIC"; case KeyEvent.VK_KATAKANA: return "VK_KATAKANA"; case KeyEvent.VK_HIRAGANA: return "VK_HIRAGANA"; case KeyEvent.VK_FULL_WIDTH: return "VK_FULL_WIDTH"; case KeyEvent.VK_HALF_WIDTH: return "VK_HALF_WIDTH"; case KeyEvent.VK_ROMAN_CHARACTERS: return "VK_ROMAN_CHARACTERS"; case KeyEvent.VK_ALL_CANDIDATES: return "VK_ALL_CANDIDATES"; case KeyEvent.VK_PREVIOUS_CANDIDATE: return "VK_PREVIOUS_CANDIDATE"; case KeyEvent.VK_CODE_INPUT: return "VK_CODE_INPUT"; case KeyEvent.VK_JAPANESE_KATAKANA: return "VK_JAPANESE_KATAKANA"; case KeyEvent.VK_JAPANESE_HIRAGANA: return "VK_JAPANESE_HIRAGANA"; case KeyEvent.VK_JAPANESE_ROMAN: return "VK_JAPANESE_ROMAN"; case KeyEvent.VK_KANA_LOCK: return "VK_KANA_LOCK"; case KeyEvent.VK_INPUT_METHOD_ON_OFF: return "VK_INPUT_METHOD_ON_OFF"; case KeyEvent.VK_CUT: return "VK_CUT"; case KeyEvent.VK_COPY: return "VK_COPY"; case KeyEvent.VK_PASTE: return "VK_PASTE"; case KeyEvent.VK_UNDO: return "VK_UNDO"; case KeyEvent.VK_AGAIN: return "VK_AGAIN"; case KeyEvent.VK_FIND: return "VK_FIND"; case KeyEvent.VK_PROPS: return "VK_PROPS"; case KeyEvent.VK_STOP: return "VK_STOP"; case KeyEvent.VK_COMPOSE: return "VK_COMPOSE"; case KeyEvent.VK_ALT_GRAPH: return "VK_ALT_GRAPH"; case KeyEvent.VK_UNDEFINED: return "VK_UNDEFINED"; default: return "UNDEFINED"; } } public String convertLocation(int location) { return ""; } }