public int getNextRandomUnvisitedPosition ( ) { // if all are visited, return -1 // if ( 0 == this . unvisitedCount ) { return - 1 ; } // if there is space continue with random sampling // int i = this . randomizer . nextInt ( this . registry . length ) ; while ( ONE == registry [ i ] ) { i = this . randomizer . nextInt ( this . registry . length ) ; } return i ; }
Get the next random unvisited position .