log.debug("set "+ keyStrokes);
   public void setKeyStrokes (String strokes) {      if (strokes != null) {         keyStrokes.setLength(0);//         System.out.println("set "+ keyStrokes);         length = strokes.length();      }      else {         keyStrokes = new StringBuffer();         length = 0;      }      keyStrokes.append(strokes);      index = 0;   }