private boolean isModified(){
  long uidListModified=uidFile.lastModified();
  long curModified=curFolder.lastModified();
  long newModified=newFolder.lastModified();
  if (curModified >= uidListModified || newModified >= uidListModified) {
    return true;
  }
  return false;
}

private boolean isModified ( ) { long uidListModified = uidFile . lastModified ( ) ; long curModified = curFolder . lastModified ( ) ; long newModified = newFolder . lastModified ( ) ; if ( curModified >= uidListModified || newModified >= uidListModified ) { return true ; } return false ; }
checks whether the folder ' s contents have been changed after the uidfile has been created .
