Game Class

import java.util.Scanner;
import java.io.*;

public class Game {
    private static String username;
    private static String password;
    private static User currentUser;
    char selection = 'a';

    public static void main(String[] args)
    {
        printMainMenu();
    }

        public Game()
        {}

        public static void printMainMenu() {
            Scanner scan = new Scanner(System.in);
            printMenu();//prints Menu with different options

            char selection = 'a';//initialises selection
            selection = scan.next().charAt(0);
            selection = Character.toUpperCase(selection);

            switch(selection)
            {
                case 'L'://allows user to login, if registered
                    login();
                    printMainMenu();
                    break;
                case 'R'://allows user to register
                    register();
                    //login();
                    break;
                case 'A'://displays information about game
                    printAbout();
                    printMainMenu();
                    break;
                case 'P':
                    play();
                    break;
                case 'B': //would normally display leader board
                    System.out.println("\tNo content to display");
                    System.exit(0);
                    break;
                case 'Q':
                    System.out.println("Goodbye! See you soon!\n");
                    if (currentUser != null) {
                        currentUser.saveData();
                    }
                    System.exit(0);
                    break;
                default://if user typed any other character other than L,R,P,B,A,Q
                 System.out.println("Invalid input");
                 System.out.println("Try again: ");
                 selection = scan.next().charAt(0);//scans new character for selection
                 selection = Character.toUpperCase(selection);
            }
        }

        public static void printMenu()//prints the menu
        {
          printMenuPoint(1);
          printMenuPoint(2);
          printMenuPoint(3);
          printMenuPoint(4);
          printMenuPoint(5);
          printMenuPoint(6);
          printMenuPoint(7);
          printMenuPoint(8);

        }
        public static void printMenuPoint(int x)//prints each point on the menu
        {
            Scanner scan = new Scanner(System.in);
            switch(x)
            {
                case 1:
                 System.out.println("Welcome to the Word Game");
                 break;
                case 2:
                 System.out.println("\t\tLogin (L)");
                 break;
                case 3:
                 System.out.println("\t\tRegister (R)");
                 break;
                case 4:
                 System.out.println("\t\tAbout (A)");
                 break;
                case 5:
                 System.out.println("\t\tPlay the Game (P)");
                 break;
                case 6:
                 System.out.println("\t\tShow the Leader Board (B)");
                 break;
                case 7:
                 System.out.println("\t\tQuit (Q)\n");
                 break;
                case 8:
                 System.out.println("Please choose an option: ");
                 break;

            }
        }

        public static void register()//allows new players to register by invoking mehtods in User class and storing ingormation there
        {
          User usercaller = new User();
          usercaller.register();
          printMainMenu();
        }

        public static boolean login()//checks if a player has registered during same run-->later will look through stored player list
        {
            Scanner scan = new Scanner(System.in);
            System.out.println("\n\tEnter your username: ");
            username=scan.nextLine();

            System.out.println("\n\tEnter your password: ");
            password=scan.nextLine();

            User loginUser = new User(username, password);

            if (loginUser.isLoginCorrect()) {
                currentUser = loginUser;
                return true;
            } else {
                System.out.println("Incorrect credentials, try again: ");
                return false;
            }
        }

        private static void play()//will check if player is logged in and then execute code for playing the game
        {
            if (currentUser != null) {
                System.out.println("\tWelcome to the game!\n");

                PlayGame playGame = new PlayGame();
                String[] question = playGame.getRandomQuestion();
                playGame.printQuestionDetails(question);

                System.out.println("Type in your answer between 1-4:");

                Scanner scan = new Scanner(System.in);
                int choice = scan.nextInt();
                boolean isCorrect = playGame.checkAnswer(choice);

                if (isCorrect) {
                    System.out.println("Correct!");
                    currentUser.increaseScore();
                    System.out.println("Current Score: " + currentUser.getCurrentScore());
                } else {
                    System.out.println("WRONG!");
                }
                currentUser.increaseTimesPlayed();
                printMainMenu();
            } else {
                System.out.println("\tYou must be logged in to play.\n");
                printMainMenu();
            }
        }
        private static void printAbout()//prints information about the game
        {
            System.out.println("This is a Vocabulary Builder game.");
            System.out.println("The purpose of this game is to help players learn the definition of a word by selection a synonym from a list of words offered to them.");
            System.out.println("It’s a fun way to learn English and you can compete against your friends and compare your high scores!");
        }

    }