public void changeTo(int pageNumber,boolean doMathWithIndexPages){
  currentCategory.setPage(pageNumber + (doMathWithIndexPages ? currentCategory.getIndexPages() : 0),this);
}

public void changeTo ( int pageNumber , boolean doMathWithIndexPages ) { currentCategory . setPage ( pageNumber + ( doMathWithIndexPages ? currentCategory . getIndexPages ( ) : 0 ) , this ) ; }
change to a page
