String old = title;
String old = this.title;
  public void setTitle(String title)  {    if (title == null && this.title == null)      return;    if (title == null || this.title == null || ! this.title.equals(title))      {	String old = title;	this.title = title;	firePropertyChange(TITLE_PROPERTY, old, this.title);      }  }