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Keyboard Flasher Java code example - Click here to copy ->>>

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class KeyboardFlasher implements AWTEventListener {

    public static void main(String[] args) {
        Toolkit tk = Toolkit.getDefaultToolkit();
        KeyboardFlasher flasher = new KeyboardFlasher();
        tk.addAWTEventListener(flasher, AWTEvent.KEY_EVENT_MASK);

        JFrame frame = new JFrame("Hack #63: Keyboard Flasher");
        JTextField tf = new JTextField("this is some text");

    public void eventDispatched(AWTEvent evt) {
        if(evt instanceof KeyEvent) {
            KeyEvent kevt = (KeyEvent)evt;
            if(kevt.getID() == KeyEvent.KEY_PRESSED) {
                System.out.println("key event: " + evt);
                if(kevt.getKeyCode() != KeyEvent.VK_SCROLL_LOCK) {

    public void flipScrollLock() {
        Toolkit tk = Toolkit.getDefaultToolkit();
        boolean state = tk.getLockingKeyState(KeyEvent.VK_SCROLL_LOCK);


/*   Swing Hacks
 *   Tips and Tools for Killer GUIs
 * By Joshua Marinacci, Chris Adamson
 *   First Edition June 2005
 *   Series: Hacks
 *   ISBN: 0-596-00907-0
 *   http://www.oreilly.com/catalog/swinghks/



The list of classes which were used on this page you can find below. The links to Java API contain official SUN documentation about all used classes.







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