Thread: Problem in navigation in a txt file with specific direction

I have a program that I am writing for class. It takes in the rooms of a txt file, creates an array for a dungeon. then I have to be able to navigate through the dungeon using n,s,e,w. When I entire north it is supposed to r--, south r++, e c++ and w --. The problem i am running into is that when I entire any of the directions, nsew, it only goes south. Here is the program
I would like to put the file online but dont' know how.

/*Wendy Nurton
 * wnurton
 * 5/5/2009
 * CS 160
 */
 
import java.io.File;
import java.util.Scanner;
import java.util.StringTokenizer;
 
public class Dungeon {
 
 
    public String rooms [][] = new String[6][4];
 
    public static void main(String[] args) throws Exception {
        Dungeon dun = new Dungeon();
        String dungeon = args[0]; 
        char direction = 'p';
        int row = 0;
        int col = 0;
        dun.printWelcomeMessage();
        dun.readRoomFile(dungeon);
        dun.printRoom(row, col);
        Scanner keyboard = new Scanner (System.in);
        direction = keyboard.next().charAt(0);
 
        do {
 
        switch (direction)
 
        {
 
        case 'h':
        case 'H':
            dun.printHelp();
            break;
        case 'n':
        case 'N':    
            if (dun.checkIsExitValid(row, col, "north"))
                row --;
            else 
                System.out.println("This is not a valid exit.");
            dun.printRoom(row, col);
            break;
        case 's':
        case 'S':
            if (dun.checkIsExitValid(row, col, "south"))
                row++;
            else
                System.out.println("This is not a valid exit.");
            dun.printRoom(row, col);
            break;
        case 'w':
        case 'W':
            if (dun.checkIsExitValid(row, col, "west"))
                col++;
            else
                System.out.println("This is not a valid exit.");
            break;
        case 'e':
        case 'E':
            if (dun.checkIsExitValid(row, col, "east"))
                col--;
            else
                System.out.println("This is not a valid exit.");
            break;
        case 'l':
        case 'L':
            dun.printRoom(row, col);
            break;
 
        }//if (dun.checkIfPit(row, col))
            //System.exit(0);
        }
        while (keyboard.next().charAt(0) != 'q');
 
 
    }
               // TODO Auto-generated method stub
 
 
    public String[] args;
    public boolean checkIsExitValid(int x, int y, String dun) {
        // TODO Auto-generated method stub
//        System.out.println(rooms[x][y]+";"+ dun);
        if (rooms[x][y].indexOf(dun)!=-1)
        return true;
        else 
            return false;
    }
    public boolean checkIfPit(int x, int y) {
        // TODO Auto-generated method stub
        return (checkIsExitValid(x, y, "pit"));
    }
    public String getRoomDescription(int row, int col) {
        // TODO Auto-generated method stub
 
        return (rooms[row][col]);
    }
 
    public void printRoom(int row, int col) {
        // TODO Auto-generated method stub
        System.out.println(rooms[row][col]);
    }
    public void printHelp() {
        // TODO Auto-generated method stub
 
        System.out.println("");
        System.out.println("Help: to play this game, you can move north, west, south or east."); 
        System.out.println("Type 'l' to take a look around at the room, or type 'q' to quit the game.");
    }
    public void printWelcomeMessage() {
        // TODO Auto-generated method stub
        System.out.println("Welcome to my dungeon!");
        System.out.println("We have creepy crawly monsters roaming about.");
        System.out.println("Find the escape route and win!");
        System.out.println("Or drop to your death in the deep pit.");
        System.out.println("Good luck!");
        System.out.println(" ");
        System.out.println("Menu options: 'h' for help, 'n' for north, 's' for south, 'w' for west, 'e' for east, 'l' to look around, and 'q' for quit.");
 
 
    }
 
    public void readRoomFile(String dungeon) throws Exception {
        File file = new File (dungeon);
        Scanner in = new Scanner(file);
 
        int i=0;
        while( in.hasNextLine())
        {
            StringTokenizer tokenizer = new StringTokenizer(in.nextLine(), ";\n");
 
            int x = Integer.parseInt(tokenizer.nextToken());
            int y = Integer.parseInt(tokenizer.nextToken());
 
 
            rooms [x][y] = (tokenizer.nextToken());
 
        }
 
 
        // TODO Auto-generated method stub
 
    }
 
}

Hello wendybird79 and welcome to the Java Programming Forums

I think you will find that this has already been solved here:

http://www.javaprogrammingforums.com...e-problem.html

Should make your life a lot easier!!

import java.io.FileReader;
import java.util.Scanner;
import java.util.regex.Pattern;
 
public class Dungeon {
    private String[][] dungeon = new String[6][4];
    public void printWelcomeMessage(){
        System.out.println("Welcome to my dungeon!");
        System.out.println("We have creepy crawly monsters roaming about.");
        System.out.println("Find the escape route and win!");
        System.out.println("Or drop to your death in the deep pit.");
        System.out.println("Good luck!");
        System.out.println();
        System.out.println("Menu options: 'h' for help, 'n' for north, 's' for south, 'w' for west, 'e' for east, 'l' to look around, and 'q' for quit.");
    }
    public void printHelp(){
        System.out.println("Help: to play this game, you can move north, west, south or east.");
        System.out.println("Type 'l' to take a look around at the room, or type 'q' to quit the game.");
    }
    public boolean readRoomFile(String file){
        Scanner fs;
        try{
            fs = new Scanner(new FileReader(file));
        }catch(Exception e){ return false; };
        for(String temp;fs.hasNextLine();){
            temp = fs.nextLine();
            dungeon[Integer.parseInt(temp.split(";")[0])][Integer.parseInt(temp.split(";")[1])] = temp.split(";")[2];
        }
        return true;
    }
    public void printRoom(int row, int col){
        System.out.println(dungeon[row][col]);
    }
    public String getRoomDescription(int row, int col){
        return dungeon[row][col];
    }
    public boolean checkIfPit(int row, int col){
        return Pattern.compile("[^a-zA-Z]pit[^a-zA-Z]").matcher(dungeon[row][col].toLowerCase()).find();
    }
    public boolean checkIsExitValid(int row, int col, char d){
        String direction = "";
        switch(d){
            case 's': direction = "south"; break;
            case 'w': direction = "west"; break;
            case 'n': direction = "north"; break;
            case 'e': direction = "east"; break;
            default: break;
        }
        if(direction != "")
            return Pattern.compile("[^a-zA-Z]"+direction+"[^a-zA-Z]").matcher(dungeon[row][col].toLowerCase()).find();
        return false;
    }
    public Dungeon(String filename){
        Scanner sin = new Scanner(System.in);
        String choice;
        Pattern goalp = Pattern.compile("[^a-zA-Z]goal[^a-zA-Z]");
        boolean goal = true;
        int roomx = 0, roomy = 0;
        do{
            if(goal){
                while(!readRoomFile(filename)){
                    System.out.print("Please enter a valid file name: ");
                    filename = sin.next();
                }
                goal = false;
                filename = "";
                printWelcomeMessage();
            }
            System.out.print(">");
            choice = sin.next();
            if(choice.equals("h")) printHelp();
            else if(choice.equals("l")) printRoom(roomy, roomx);
            else if(choice.equals("n")||choice.equals("s")||choice.equals("e")||choice.equals("w")){
                if(checkIsExitValid(roomy, roomx, choice.toLowerCase().charAt(0))){
                    switch(choice.charAt(0)){
                        case 'n': roomy -= 1; break;
                        case 's': roomy += 1; break;
                        case 'e': roomx += 1; break;
                        case 'w': roomx -= 1; break;
                        default: break;
                    }
                    printRoom(roomy, roomx);
                }else{
                    System.out.print("There is no exit to the ");
                    switch(choice.charAt(0)){
                        case 'n': System.out.println("north."); break;
                        case 's': System.out.println("south."); break;
                        case 'e': System.out.println("east."); break;
                        case 'w': System.out.println("west."); break;
                    }
                }
            }
            if(goalp.matcher(getRoomDescription(roomy, roomx).toLowerCase()).find() || checkIfPit(roomy, roomx) || choice.equals("q")){
                goal = true;
                System.out.println("Good Bye!");
            }
        }while(!choice.equals("q"));
    }
    public static void main(String[] args) {
        if(args.length > 0) new Dungeon(args[0]);
        else new Dungeon("");
    }
}