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Thread: Maze Game

  1. #1
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    Default Maze Game

    First post in the forum and i am a beginner as far as programming is concerned. The task is to read in a text file that has the size of the maze in the first line then maze follows. The out put im looking for is true that i did escape the maze but i am only seeing false or out of ArrayOutOfBoundsError when i am positive it is still inbound.
    Any feedback is very much appreciated.
    public class Maze
    {
       // public static char map[][];
        public Maze(int row, int col, char map[][])
        {
            Main.row = row;
            Main.col = col;
            Main.map = map;
     
            System.out.println(map[row][col]);
     
        }
     
    public boolean excape(int row, int col)
    {
       boolean exit = false;
     
       if(isValid(row, col))
       {
          Main.map[row][col] = Main.WALL;
     
          if (row == Main.map.length-1 && col == Main.map[0].length-1)
             exit = true; //the maze is solved
          else
          {
             exit = excape(row+1, col); //down
             if (!exit)
                exit = excape(row, col+1); //right
             if (!exit)
                exit = excape(row-1, col); //up
             if (!exit)
                exit = excape(row, col-1); //left         
          }
     
       }
       return exit;
     }
     
        public boolean isValid(int row, int col)
        {
            if(row <9 || col< 9 )
            {
     
            }
              return true;
        }


  2. #2
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    Default Re: Maze Game

    It would be a bit more helpful if you posted where the ArrayOutOfBoundsException was occurring.
    It could be down to a number of reasons.

    The initial indices could be out of bounds as your isValid() method always returns true.
    Even if row and col are valid indices, when you start doing stuff like row+1, the index could easily fall off the end of the array.

    If you don't know what ArrayOutOfBoundsException means, then check out:
    ArrayIndexOutOfBoundsException (Java 2 Platform SE v1.4.2)
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

  3. #3
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    Default Re: Maze Game

    Enter input file name: maze1.txt
    Enter X position: 1
    Enter Y position: 1
    Start Position: 1,1


    * *******
    * * *
    * ***** *
    * * * *
    * * *** *
    * * *
    *** * * *
    * * *
    ******* *

    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 9
    at ch_13_maze.Maze.excape(Maze.java:28)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Maze.excape(Maze.java:34)
    at ch_13_maze.Main.main(Main.java:67)
    Java Result: 1

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