Example usage for java.awt.event KeyEvent getKeyCode

Introduction

In this page you can find the example usage for java.awt.event KeyEvent getKeyCode.

Prototype

public int getKeyCode() 

Source Link

Document

Returns the integer keyCode associated with the key in this event.

Usage

From source file:AddingActionCommandActionListenerSample.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Default Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextField textField = new JTextField();
    frame.add(textField, BorderLayout.NORTH);

    KeyListener keyListener = new KeyListener() {
        public void keyPressed(KeyEvent keyEvent) {
            printIt("Pressed", keyEvent);
        }/*w  w w .j  av  a  2  s  .c  o m*/

        public void keyReleased(KeyEvent keyEvent) {
            printIt("Released", keyEvent);
        }

        public void keyTyped(KeyEvent keyEvent) {
            printIt("Typed", keyEvent);
        }

        private void printIt(String title, KeyEvent keyEvent) {
            int keyCode = keyEvent.getKeyCode();
            String keyText = KeyEvent.getKeyText(keyCode);
            System.out.println(title + " : " + keyText);
        }
    };
    textField.addKeyListener(keyListener);
    textField.addKeyListener(keyListener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextField nameTextField = new JTextField();
    frame.add(nameTextField, BorderLayout.NORTH);

    KeyListener keyListener = new KeyListener() {
        public void keyPressed(KeyEvent keyEvent) {
            printIt("Pressed", keyEvent);
        }//from   w ww.j a  v  a 2  s .c o  m

        public void keyReleased(KeyEvent keyEvent) {
            printIt("Released", keyEvent);
        }

        public void keyTyped(KeyEvent keyEvent) {
            printIt("Typed", keyEvent);
        }

        private void printIt(String title, KeyEvent keyEvent) {
            int keyCode = keyEvent.getKeyCode();
            String keyText = KeyEvent.getKeyText(keyCode);
            System.out.println(title + " : " + keyText + " / " + keyEvent.getKeyChar());
        }
    };
    nameTextField.addKeyListener(keyListener);

    frame.setSize(250, 100);
    frame.setVisible(true);
}

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From source file:KeyTest.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Key Listener");
    Container contentPane = frame.getContentPane();

    KeyListener listener = new KeyListener() {
        public void keyPressed(KeyEvent e) {
            dumpInfo("Pressed", e);
        }//from ww w  .ja va 2 s .  c  o  m

        public void keyReleased(KeyEvent e) {
            dumpInfo("Released", e);
        }

        public void keyTyped(KeyEvent e) {
            dumpInfo("Typed", e);
        }

        private void dumpInfo(String s, KeyEvent e) {
            System.out.println(s);
            int code = e.getKeyCode();
            System.out.println("\tCode: " + KeyEvent.getKeyText(code));
            System.out.println("\tChar: " + e.getKeyChar());
            int mods = e.getModifiersEx();
            System.out.println("\tMods: " + KeyEvent.getModifiersExText(mods));
            System.out.println("\tLocation: " + location(e.getKeyLocation()));
            System.out.println("\tAction? " + e.isActionKey());
        }

        private String location(int location) {
            switch (location) {
            case KeyEvent.KEY_LOCATION_LEFT:
                return "Left";
            case KeyEvent.KEY_LOCATION_RIGHT:
                return "Right";
            case KeyEvent.KEY_LOCATION_NUMPAD:
                return "NumPad";
            case KeyEvent.KEY_LOCATION_STANDARD:
                return "Standard";
            case KeyEvent.KEY_LOCATION_UNKNOWN:
            default:
                return "Unknown";
            }
        }
    };

    JTextField text = new JTextField();
    text.addKeyListener(listener);
    contentPane.add(text, BorderLayout.NORTH);
    frame.pack();
    frame.show();
}

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From source file:JTextFieldSample.java

public static void main(String args[]) {
    String title = (args.length == 0 ? "TextField Listener Example" : args[0]);
    JFrame frame = new JFrame(title);
    Container content = frame.getContentPane();

    JPanel namePanel = new JPanel(new BorderLayout());
    JLabel nameLabel = new JLabel("Name: ");
    nameLabel.setDisplayedMnemonic(KeyEvent.VK_N);
    JTextField nameTextField = new JTextField();
    nameLabel.setLabelFor(nameTextField);
    namePanel.add(nameLabel, BorderLayout.WEST);
    namePanel.add(nameTextField, BorderLayout.CENTER);
    content.add(namePanel, BorderLayout.NORTH);

    JPanel cityPanel = new JPanel(new BorderLayout());
    JLabel cityLabel = new JLabel("City: ");
    cityLabel.setDisplayedMnemonic(KeyEvent.VK_C);
    JTextField cityTextField = new JTextField();
    cityLabel.setLabelFor(cityTextField);
    cityPanel.add(cityLabel, BorderLayout.WEST);
    cityPanel.add(cityTextField, BorderLayout.CENTER);
    content.add(cityPanel, BorderLayout.SOUTH);

    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            System.out.println("Command: " + actionEvent.getActionCommand());
        }/*www .  j av  a 2  s .  com*/
    };
    nameTextField.setActionCommand("Yo");
    nameTextField.addActionListener(actionListener);
    cityTextField.addActionListener(actionListener);

    KeyListener keyListener = new KeyListener() {
        public void keyPressed(KeyEvent keyEvent) {
            printIt("Pressed", keyEvent);
        }

        public void keyReleased(KeyEvent keyEvent) {
            printIt("Released", keyEvent);
        }

        public void keyTyped(KeyEvent keyEvent) {
            printIt("Typed", keyEvent);
        }

        private void printIt(String title, KeyEvent keyEvent) {
            int keyCode = keyEvent.getKeyCode();
            String keyText = KeyEvent.getKeyText(keyCode);
            System.out.println(title + " : " + keyText + " / " + keyEvent.getKeyChar());
        }
    };
    nameTextField.addKeyListener(keyListener);
    cityTextField.addKeyListener(keyListener);

    InputVerifier verifier = new InputVerifier() {
        public boolean verify(JComponent input) {
            final JTextComponent source = (JTextComponent) input;
            String text = source.getText();
            if ((text.length() != 0) && !(text.equals("Exit"))) {
                Runnable runnable = new Runnable() {
                    public void run() {
                        JOptionPane.showMessageDialog(source, "Can't leave.", "Error Dialog",
                                JOptionPane.ERROR_MESSAGE);
                    }
                };
                SwingUtilities.invokeLater(runnable);
                return false;
            } else {
                return true;
            }
        }
    };
    nameTextField.setInputVerifier(verifier);
    cityTextField.setInputVerifier(verifier);

    DocumentListener documentListener = new DocumentListener() {
        public void changedUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        public void insertUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        public void removeUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        private void printIt(DocumentEvent documentEvent) {
            DocumentEvent.EventType type = documentEvent.getType();
            String typeString = null;
            if (type.equals(DocumentEvent.EventType.CHANGE)) {
                typeString = "Change";
            } else if (type.equals(DocumentEvent.EventType.INSERT)) {
                typeString = "Insert";
            } else if (type.equals(DocumentEvent.EventType.REMOVE)) {
                typeString = "Remove";
            }
            System.out.print("Type  :   " + typeString + " / ");
            Document source = documentEvent.getDocument();
            int length = source.getLength();
            try {
                System.out.println("Contents: " + source.getText(0, length));
            } catch (BadLocationException badLocationException) {
                System.out.println("Contents: Unknown");
            }
        }
    };
    nameTextField.getDocument().addDocumentListener(documentListener);
    cityTextField.getDocument().addDocumentListener(documentListener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

---

From source file:Main.java

public static void main(String[] args) {
    JFrame aWindow = new JFrame();

    aWindow.setBounds(50, 100, 300, 300);
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextField typingArea = new JTextField(20);
    typingArea.addKeyListener(new KeyListener() {
        /** Handle the key typed event from the text field. */
        public void keyTyped(KeyEvent e) {
            displayInfo(e, "KEY TYPED: ");
        }/*w  w  w . j  a  v a2 s . co  m*/

        /** Handle the key pressed event from the text field. */
        public void keyPressed(KeyEvent e) {
            displayInfo(e, "KEY PRESSED: ");
        }

        /** Handle the key released event from the text field. */
        public void keyReleased(KeyEvent e) {
            displayInfo(e, "KEY RELEASED: ");
        }

        protected void displayInfo(KeyEvent e, String s) {
            String keyString, modString, tmpString, actionString, locationString;
            int id = e.getID();
            if (id == KeyEvent.KEY_TYPED) {
                char c = e.getKeyChar();
                keyString = "key character = '" + c + "'";
            } else {
                int keyCode = e.getKeyCode();
                keyString = "key code = " + keyCode + " (" + KeyEvent.getKeyText(keyCode) + ")";
            }

            int modifiers = e.getModifiersEx();
            modString = "modifiers = " + modifiers;
            tmpString = KeyEvent.getModifiersExText(modifiers);
            if (tmpString.length() > 0) {
                modString += " (" + tmpString + ")";
            } else {
                modString += " (no modifiers)";
            }

            actionString = "action key? ";
            if (e.isActionKey()) {
                actionString += "YES";
            } else {
                actionString += "NO";
            }

            locationString = "key location: ";
            int location = e.getKeyLocation();
            if (location == KeyEvent.KEY_LOCATION_STANDARD) {
                locationString += "standard";
            } else if (location == KeyEvent.KEY_LOCATION_LEFT) {
                locationString += "left";
            } else if (location == KeyEvent.KEY_LOCATION_RIGHT) {
                locationString += "right";
            } else if (location == KeyEvent.KEY_LOCATION_NUMPAD) {
                locationString += "numpad";
            } else { // (location == KeyEvent.KEY_LOCATION_UNKNOWN)
                locationString += "unknown";
            }

            System.out.println(keyString);
            System.out.println(modString);
            System.out.println(actionString);
            System.out.println(locationString);
        }

    });
    aWindow.add(typingArea);
    aWindow.setVisible(true);
}

---

From source file:Main.java

/**
 * Attaches a key event listener to given component, simulating a button click upon
 * pressing enter within the context.//from ww  w . ja v  a2 s . com
 * 
 * @param context
 * @param button
 */
public static void simulateClickOnEnter(Component context, JButton button) {
    context.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ENTER)
                button.doClick();
        }
    });
}

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From source file:Main.java

public static boolean isPasteAction() {
    AWTEvent e = EventQueue.getCurrentEvent();
    if (e != null && e.getID() == KeyEvent.KEY_PRESSED) {
        KeyEvent k = (KeyEvent) e;
        if (k.getKeyCode() == KeyEvent.VK_V && k.getModifiers() == KeyEvent.CTRL_MASK) {
            return true;
        }// ww  w  . j  a  v a2  s.  c o m
    }
    return false;
}

---

From source file:Main.java

/**
 * Attaches a key event listener to given component, disposing of the given window
 * upon pressing escape within the context.
 * //from   w  w  w. j av a  2s.  co m
 * @param context
 * @param button
 */
public static void simulateExitOnEscape(Component context, JFrame window) {
    context.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                for (WindowListener wl : window.getWindowListeners()) {
                    wl.windowClosing(new WindowEvent(window, WindowEvent.WINDOW_CLOSING));
                }

                if (window != null)
                    window.dispose();
            }
        }
    });
}

---

From source file:Main.java

public static void addEscapeExitListeners(final JFrame window) {
    addKeyAdapterRecursively(window, new KeyAdapter() {
        @Override/*w ww .j  av  a  2 s . c  o  m*/
        public void keyPressed(final KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                System.exit(0);
            }
        }
    });
}

---

From source file:Main.java

public static void addEscapeExitListeners(final JDialog window) {
    addKeyAdapterRecursively(window, new KeyAdapter() {
        @Override//from   ww w  .  ja  v a2  s . co  m
        public void keyPressed(final KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                System.exit(0);
            }
        }
    });
}

---

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