20 Questions

while(!temp.isLeaf()) {
            System.out.print(temp.root + " (Y/N)? ");
            String rootAnswer = scanner.nextLine();

            if(rootAnswer.equals("Y"))
                temp = temp.getRightSubtree();

            else if(rootAnswer.equals("N"))
                temp = temp.getLeftSubtree();

            else
                System.out.println("Please enter Y or N next time!");

        }


        while(temp.isLeaf()) {
            System.out.print(temp.getData() + " (Y/N)? ");
            String firstGuess = scanner.next();

            if(firstGuess.equals("Y")) {
                System.out.println("I guessed it!");
                break;
            }


            else if(firstGuess.equals("N")) {
                Scanner animalGet = new Scanner(System.in);
                System.out.print("What is your animal? ");
                String animal = animalGet.next();

                Scanner questionGet = new Scanner(System.in);
                System.out.print("Provide a question that uniquely identifies your animal? ");
                String question = questionGet.nextLine();

                String save = temp.getData();
                temp.setData(question);
                temp.setRightSubtree(new BinaryTree<>(animal));
                temp.setLeftSubtree(new BinaryTree<>(save));
            }

            else
                System.out.print("Please enter Y or N next time!");
        }