Java Robot class problem

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 */
package test;

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

/**
 *
 * @author kajacx
 */
public class RobotArrow {

    public static void main(String[] args) throws InterruptedException, AWTException {
        JFrame f = new JFrame("TEST");
        f.setSize(200, 200);
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);

        KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
        manager.addKeyEventDispatcher(new KeyEventDispatcher() {
            @Override
            public boolean dispatchKeyEvent(KeyEvent e) {
                if (e.getID() == KeyEvent.KEY_PRESSED) {
                    System.out.format("code: %d, location: %d\n",
                            e.getKeyCode(), e.getKeyLocation());
                }
                return false;
            }
        });

        Thread.sleep(1000);

        Robot bot = new Robot();

        bot.keyPress(KeyEvent.VK_UP);
        bot.keyRelease(KeyEvent.VK_UP);

        bot.keyPress(KeyEvent.VK_KP_UP);
        bot.keyRelease(KeyEvent.VK_KP_UP);
    }
}