question: public UnsortedInputIterator ( InputIterator source ) throws IOException { super ( source ) ; ords = new int [ entries . size ( ) ] ; Random random = new Random ( ) ; for ( int i = 0 ; i < ords . length ; i ++ ) { ords [ i ] = i ; } for ( int i = 0 ; i < ords . length ; i ++ ) { int randomPosition = random . nextInt ( ords . length ) ; int temp = ords [ i ] ; ords [ i ] = ords [ randomPosition ] ; ords [ randomPosition ] = temp ; } }
target:  Creates a new iterator, wrapping the specified iterator and returning elements in a random order.