Example usage for java.awt.event KeyEvent getKeyChar

Introduction

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

Prototype

public char getKeyChar() 

Source Link

Document

Returns the character associated with the key in this event.

Usage

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);
        }/*  w  w w.  j  a  va 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);
        }//w w w.ja va  2  s . co  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());
        }//from   w w  w  .  j a va  2s  . 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: ");
        }//ww w .  ja v a2  s.c  o 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

/**
 * Set the text component in which only numerics (positive decimal integers
 * with character 0-9).//from w w  w .  ja v a2s.  co m
 * 
 * @param c
 *            the specified text component
 */
public static void setTextComponetIntegerValid(final JTextComponent c) {
    c.addKeyListener(new KeyAdapter() {
        @Override
        public void keyTyped(KeyEvent e) {
            if (e.getKeyChar() != KeyEvent.VK_BACK_SPACE)
                try {
                    Integer.valueOf(c.getText() + e.getKeyChar());
                } catch (NumberFormatException nfe) {
                    e.consume();
                    Toolkit.getDefaultToolkit().beep();
                }
        }
    });
}

---

From source file:Main.java

/**
 * Key to lowercase String, extracts the effective key that was pressed
 * (without shift, control, alt)//  w  ww.  ja  v a 2s. c  o m
 */
public static String getKeyText(KeyEvent e) {
    // special cases
    if (e.getKeyCode() == KeyEvent.VK_DELETE) {
        return "delete";
    }
    // prio 1: get text of unresolved code (shift-1 --> '1')
    String s = "" + e.getKeyChar();
    if (e.getKeyCode() > 0) {
        int flags = Modifier.PUBLIC | Modifier.STATIC | Modifier.FINAL;
        for (Field f : KeyEvent.class.getFields()) {
            if ((f.getModifiers() & flags) == flags) {
                try {
                    if (f.getName().startsWith("VK_") && ((Integer) f.get(null)) == e.getKeyCode()) {
                        s = f.getName().substring(3).toLowerCase();
                        break;
                    }
                } catch (Throwable t) {
                    // nop
                }
            }
        }
    }
    if (s.length() != 1) {
        // prio 2: check if the resolved char is valid (shift-1 --> '+')
        if (e.getKeyChar() >= 32 && e.getKeyChar() < 128) {
            s = "" + e.getKeyChar();
        }
    }
    return s.toLowerCase();
}

---

From source file:com.SCI.centraltoko.utility.UtilityTools.java

public static void setAutoUpperCase(final JTextField textField) {
    textField.addKeyListener(new KeyAdapter() {

        @Override//  ww  w. j  a v a2 s  .  c  o m
        public void keyReleased(KeyEvent e) {
            if (Character.isLetter(e.getKeyChar())) {
                convertToUpperCase((JTextField) e.getSource());
            }
        }

    });
}

---

From source file:com.SCI.centraltoko.utility.UtilityTools.java

public static void setAutoUpperCase(final JTextArea textArea) {
    textArea.addKeyListener(new KeyAdapter() {

        @Override/*from   ww  w  .jav  a  2s . c om*/
        public void keyReleased(KeyEvent e) {
            if (Character.isLetter(e.getKeyChar())) {
                convertToUpperCase((JTextArea) e.getSource());
            }
        }

    });
}

---

From source file:com.SCI.centraltoko.utility.UtilityTools.java

public static void setNumericTextOnly(final JTextField textField) {
    textField.addKeyListener(new KeyAdapter() {

        @Override/*  ww  w.  ja v  a  2  s . com*/
        public void keyTyped(KeyEvent e) {
            if (!Character.isDigit(e.getKeyChar()) || BAD_CHARS.indexOf(e.getKeyChar()) > -1) {
                e.consume();
            }
        }

    });

}

---

From source file:org.openconcerto.erp.core.common.ui.DeviseField.java

public static void addFilteringKeyListener(final JTextField textField) {

    textField.addKeyListener(new KeyAdapter() {
        public void keyTyped(java.awt.event.KeyEvent keyEvent) {

            final char keychar = keyEvent.getKeyChar();

            if (keychar == KeyEvent.VK_BACK_SPACE) {
                return;
            }/*from w ww .  j av  a 2 s.c  o  m*/

            // pas plus de 2 chiffres apres la virgule
            int pointPosition = textField.getText().indexOf('.');
            if (Character.isDigit(keychar)) {
                if (pointPosition > -1) {
                    // System.err.println("Text Selected :: " + textField.getSelectedText());
                    if (textField.getSelectedText() == null) {
                        if (textField.getCaretPosition() <= pointPosition) {
                            return;
                        } else {
                            if (textField.getText().substring(pointPosition).length() <= 2) {
                                return;
                            }
                        }
                    } else {
                        return;
                    }
                } else {
                    return;
                }
            }

            if (keychar == KeyEvent.VK_PERIOD && textField.getText().indexOf('.') < 0)
                return;
            // if (keychar == KeyEvent.VK_MINUS && (textField.getText().indexOf('-') < 0) &&
            // textField.getCaretPosition() == 0)
            // return;

            keyEvent.consume();
        }
    });
}

---

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