code: public void keyPressed(KeyEvent e) {
  		int offset = (e.getKeyCode() == KeyEvent.VK_UP) ? (-7) : ((e
  				.getKeyCode() == KeyEvent.VK_DOWN) ? (+7)
  				: ((e.getKeyCode() == KeyEvent.VK_LEFT) ? (-1) : ((e
  						.getKeyCode() == KeyEvent.VK_RIGHT) ? (+1) : 0)));
  
  		int newDay = getDay() + offset;
  
  		if ((newDay >= 1)
  				&& (newDay <= calendar.getMaximum(Calendar.DAY_OF_MONTH))) {
  			setDay(newDay);
  		}
  	}
docs: JDayChooser is the KeyListener for all day buttons. (Added by Thomas
  Schaefer and modified by Austin Moore)
  
  @param e
  the KeyEvent