Question

Why can't the 'length' be resolved?

import java.util.*;

enum Commands {
    UNKNOWN,
    QUIT,
    LOOK,
    NORTH,
    SOUTH,
    EAST,
    WEST
}

public class Main {

    public static void main(String[] args) {
        System.out.println("Welcome to Zork!");
        SpawnPlayer();
        Scanner scanner = new Scanner(System.in);

        Commands command = Commands.UNKNOWN;

        while (command != Commands.QUIT) {
            System.out.println(rooms[]locationRow[locationColumn]);
            System.out.print(">");
            String inputString = scanner.nextLine();
            command = ToCommand(inputString);

            switch (command)
            {
                case QUIT:
                    System.out.println("Thank you for playing!");
                    break;

                case LOOK:
                    System.out.println("A rubber mat saying 'Welcome to Zork!' lies by the door.");
                    break;
                // North, South, East and West have all the same behaviors
                case NORTH:
                case SOUTH:
                case EAST:
                case WEST:
                    // Move command passes the command to the method to navigate throughout the maze
                    Move(command);
                    break;

                default:
                    System.out.println("Unknown command.");
                    break;
            }
        }
    }

    private static Commands ToCommand(String commandString) {
        try {
            return Commands.valueOf(commandString.trim().toUpperCase());
        } catch (IllegalArgumentException ex) {
            return Commands.UNKNOWN;
        }
    }
    // New Move method that uses commands to navigate throughout the maze
    // uses a boolean method IsDirection which passes back
    private static void Move(Commands command) {
        if (IsDirection(command) == false)
        {
            throw new IllegalArgumentException();
        }

        boolean isValidMove;
        switch (command)
        {
            case NORTH:
                if (locationRow > 0) {
                    isValidMove = true;
                    locationRow--;
                }
                break;

            case SOUTH:
                if (locationRow < rooms[locationColumn].length - 1) {
                    isValidMove = true;
                    locationRow++;
                }
            case EAST:
                if (locationColumn < rooms.length - 1) {
                    isValidMove = true;
                    locationColumn++;
                }
                else
                {
                    isValidMove = false;
                }
                break;

            case WEST:
                if (locationColumn > 0) {
                    isValidMove = true;
                    locationColumn--;
                }
                else
                {
                    isValidMove = false;
                }
                break;

            default:
                isValidMove = false;
                break;
        }

        if (isValidMove == false)
        {
            System.out.println("The way is blocked!");
        }
    }
    // IsDirection method to process the command
    private static boolean IsDirection(Commands command)
    {
        return directions.contains(command);
    }
    // Final Static array which contains the rooms
    // Foyer is at poistion 0

    private static void SpawnPlayer(){
        Random random = new Random();
        locationRow = random.nextInt(rooms.length);
        System.out.println("Location1: " + locationRow);
        locationRow = random.nextInt(rooms[0].length);
        System.out.println("Location1: " + locationRow);
    }
    private static final String[] rooms = {
            "Foyer",
            "Kitchen",
            "Living Room",
            "Dining Room",
            "Bedroom"
    };
    // Sets the starting room location to 0 which is the Foyer
    private static int locationColumn = 0;
    private static int locationRow = 0;

    // Array with a list of valid commands
    private static final ArrayList directions = new ArrayList(Arrays.asList(
            Commands.NORTH,
            Commands.SOUTH,
            Commands.EAST,
            Commands.WEST));
}

Answer 1

import java.util.*;

enum Commands {
    UNKNOWN,
    QUIT,
    LOOK,
    NORTH,
    SOUTH,
    EAST,
    WEST
}

public class Main {

    public static void main(String[] args) {
        System.out.println("Welcome to Zork!");
        SpawnPlayer();
        Scanner scanner = new Scanner(System.in);

        Commands command = Commands.UNKNOWN;

        while (command != Commands.QUIT) {
            System.out.println(rooms[locationRow].charAt(locationColumn));
            System.out.print(">");
            String inputString = scanner.nextLine();
            command = ToCommand(inputString);

            switch (command) {
                case QUIT:
                    System.out.println("Thank you for playing!");
                    break;

                case LOOK:
                    System.out.println("A rubber mat saying 'Welcome to Zork!' lies by the door.");
                    break;
                // North, South, East and West have all the same behaviors
                case NORTH:
                case SOUTH:
                case EAST:
                case WEST:
                    // Move command passes the command to the method to navigate throughout the maze
                    Move(command);
                    break;

                default:
                    System.out.println("Unknown command.");
                    break;
            }
        }
    }

    private static Commands ToCommand(String commandString) {
        try {
            return Commands.valueOf(commandString.trim().toUpperCase());
        } catch (IllegalArgumentException ex) {
            return Commands.UNKNOWN;
        }
    }

    // New Move method that uses commands to navigate throughout the maze
    // uses a boolean method IsDirection which passes back
    private static void Move(Commands command) {
        if (IsDirection(command) == false) {
            throw new IllegalArgumentException();
        }

        boolean isValidMove = false;
        switch (command) {
            case NORTH:
                if (locationRow > 0) {
                    isValidMove = true;
                    locationRow--;
                }
                break;

            case SOUTH:
                if (locationRow < rooms[locationColumn].length() - 1) {
                    isValidMove = true;
                    locationRow++;
                }
            case EAST:
                if (locationColumn < rooms.length - 1) {
                    isValidMove = true;
                    locationColumn++;
                } else {
                    isValidMove = false;
                }
                break;

            case WEST:
                if (locationColumn > 0) {
                    isValidMove = true;
                    locationColumn--;
                } else {
                    isValidMove = false;
                }
                break;

            default:
                isValidMove = false;
                break;
        }

        if (isValidMove == false) {
            System.out.println("The way is blocked!");
        }
    }

    // IsDirection method to process the command
    private static boolean IsDirection(Commands command) {
        return directions.contains(command);
    }
    // Final Static array which contains the rooms
    // Foyer is at poistion 0

    private static void SpawnPlayer() {
        Random random = new Random();
        locationRow = random.nextInt(rooms.length);
        System.out.println("Location1: " + locationRow);
        locationRow = random.nextInt(rooms[0].length());
        System.out.println("Location1: " + locationRow);
    }

    private static final String[] rooms = {
            "Foyer",
            "Kitchen",
            "Living Room",
            "Dining Room",
            "Bedroom"
    };
    // Sets the starting room location to 0 which is the Foyer
    private static int locationColumn = 0;
    private static int locationRow = 0;

    // Array with a list of valid commands
    private static final ArrayList directions = new ArrayList(Arrays.asList(
            Commands.NORTH,
            Commands.SOUTH,
            Commands.EAST,
            Commands.WEST));
}