Separating levels of abstraction

abstraction.java

public String render() throws Exception
{
  HtmlTag hr = new HtmlTag("hr");
  if (extraDashes > 0)
    hr.addAttribute("size", hrSize(extraDahses));
   return hr.html();
 }
 
private String hrSize(int height)
{
  int hrSize = height + 1;
  return String.format("%d", hrSize);
}