return height;
return height + 5;
  public int getHeight()  {    Component[] components = getComponents();    int height = 0;    for(int i = 0; i < components.length; i++)    {      Component c = components[i];      if(c instanceof DisplayItem)      {        int itemHeight = c.getPreferredSize().height;        if(itemHeight > height) height = itemHeight;      }    }    return height;  }