public class TestFrame extends JFrame implements KeyListener {

    public TestFrame() {
        this.addKeyListener(this);
        this.setVisible(true);
    }

    @Override
    public void keyPressed(KeyEvent arg0) {
        // TODO Auto-generated method stub
        System.out.println((arg0.getKeyCode() == KeyEvent.VK_UP));
    }

    @Override
    public void keyReleased(KeyEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void keyTyped(KeyEvent arg0) {
        // TODO Auto-generated method stub

    }
}