MazeSolver Part 3

/**
 * Solves a maze
 *
 * @Saman Verma
 * @3/17/18
 */

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

public class MazeSolver
{ public Stack<String> MazePath = new Stack <String>();
    public String Location;
    public int i = 0;
    public ArrayList <String> oldPath = new ArrayList<String>();

    public ArrayList <String> maze = new ArrayList<String>();
    public void MazeReader(){


        try{Scanner MazeScanner = new Scanner(new BufferedReader(new FileReader("maze.txt")));
            while(MazeScanner.hasNextLine()){
                maze.add(MazeScanner.nextLine());

            }}catch(Exception e){
            System.out.print(e.getMessage());
            e.printStackTrace();}
        for(int y = 0; y<maze.size(); y++){
            int j = 0;
            if (j != 0) {i++;}
            j++;
            for(int x = 0; x<maze.get(y).length(); x++){

                String check = maze.get(y).substring(x,x+1);

                if(check.equals("@")){
                    String yCoordinate = String.valueOf(y);
                    String xCoordinate = String.valueOf(x);
                    Location = xCoordinate + "," + yCoordinate;
                    MazePath.push(Location);
                }
            }
        }

    }
    public static void main(String [] args){
      MazeSolver MazeSolver = new MazeSolver();
      MazeSolver.MazeReader();
      MazeSolver.solveTheMaze();
      MazeSolver.printer();

    }
    public void Left(int x, int y){

        x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));
        x = x-1;
        if(x <0) {
            return;
        }
        boolean hasBeen = oldPlace(x, y);
        if(hasBeen == true){return;}
        String xCd = String.valueOf(x);
        String yCd = String.valueOf(y);
        if(maze.get(y).substring(x,x+1).equals(".") || maze.get(y).substring(x,x+1).equals("$")){
            Location = xCd + "," + yCd;
            MazePath.push(Location);
        }


    }
    public void Right(int x, int y){
        String Position = MazePath.peek();
         x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));
        x = x+1;
        boolean hasBeen = oldPlace(x, y);
        if(hasBeen == true){return;}
        String xCd = String.valueOf(x);
        String yCd = String.valueOf(y);
        if(maze.get(y).substring(x,x+1) == null) {return;}
        else if(maze.get(y).substring(x,x+1) == "." || maze.get(y).substring(x,x+1) == "$"){
            Location = xCd + "," + yCd;
            MazePath.push(Location);
        }



    }
    public void Down(int x, int y){

        x = Integer.parseInt(Location.substring(0,1));
        y = Integer.parseInt(Location.substring(2,3));
        y = y-1;
        String xCd = String.valueOf(x);
        String yCd = String.valueOf(y);
        if(y <0) {
            return;
        }
        boolean hasBeen = oldPlace(x, y);
        if(hasBeen == true){return;}
        if(maze.get(y).substring(x,x+1).equals(".") || maze.get(y).substring(x,x+1).equals("$")){
            Location = xCd + "," + yCd;
            MazePath.push(Location);
        }

    }
    public void Up(int x, int y){

         x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));
        y = y+1;
        String xCd = String.valueOf(x);
        String yCd = String.valueOf(y);

        boolean hasBeen = oldPlace(x, y);
        if(hasBeen == true){return;}
        else if(maze.get(y).substring(x,x+1).equals(".") || maze.get(y).substring(x,x+1).equals("$")){
            Location = xCd + "," + yCd;
            MazePath.push(Location);
        }



    }
    public String getCurrentPosition(){
        String currentPosition = MazePath.peek();
        return currentPosition;
    }
    public Stack solveTheMaze(){
        int x = Integer.parseInt(Location.substring(0,1));
        int y = Integer.parseInt(Location.substring(2,3));

        while(!(maze.get(y).substring(x,x+1).equals("$"))){

            boolean hasBeen = oldPlace(x, y);

            Left(x, y);
             x = Integer.parseInt(Location.substring(0,1));
             y = Integer.parseInt(Location.substring(2,3));
            Right(x, y);
             x = Integer.parseInt(Location.substring(0,1));
             y = Integer.parseInt(Location.substring(2,3));
            Down(x, y);
             x = Integer.parseInt(Location.substring(0,1));
             y = Integer.parseInt(Location.substring(2,3));
            Up(x, y);
             x = Integer.parseInt(Location.substring(0,1));
             y = Integer.parseInt(Location.substring(2,3));

            boolean r = RightChecker(x, y);
            boolean l = LeftChecker(x, y);
            boolean u = UpChecker(x, y);
            boolean d = DownChecker(x, y);

           while(r== true && l== true && u== true && d == true){
               String check = maze.get(y).substring(x,x+1);

               if(check.equals("@")) {

                   break;

               }
               while (hasBeen == true)
               {MazePath.pop();
               Location = MazePath.peek();
               x = Integer.parseInt(Location.substring(0,1));
               y = Integer.parseInt(Location.substring(2,3));
               r =  RightChecker(x, y);
               l = LeftChecker(x, y);
               u = UpChecker(x, y);
               d = DownChecker(x, y);
               hasBeen = oldPlace(x, y);
            }
            }

        }
        return MazePath;
    }
    public boolean RightChecker(int x, int y){
        x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));

                int xCheck = x +1;
                int yCheck = y;
                String xCd = String.valueOf(xCheck);
                String yCd = String.valueOf(yCheck);
                if(maze.get(yCheck).substring(xCheck).equals(".") || maze.get(y).substring(x,x+1).equals("$")){
                    return true;
        }else if(maze.get(yCheck).substring(xCheck, xCheck + 1) == null){
            return false;
        }
                else{return false;}

    }
    public boolean LeftChecker(int x, int y){
        x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));

                 x = x -1;
                y = y;
                String xCd = String.valueOf(x);
                String yCd = String.valueOf(y);
                if(maze.get(y).substring(x, x +1).equals(".") || maze.get(y).substring(x, x+1).equals("$")){
                    return true;
        }else if(maze.get(y).substring(x, x+1) == null){
            return false;
        }
                else{return false;}

    }
    public boolean UpChecker(int x, int y){
        x = Integer.parseInt(Location.substring(0,1));
         y = Integer.parseInt(Location.substring(2,3));

                int xCheck = x;
                int yCheck = y + 1;
                String xCd = String.valueOf(xCheck);
                String yCd = String.valueOf(yCheck);
                if(yCheck > i) {return false;}
                else if(maze.get(yCheck).substring(xCheck, xCheck +1).equals(".") || maze.get(yCheck).substring(xCheck,xCheck+1).equals("$")){
                    return true;
        } else if(maze.get(yCheck).substring(xCheck, xCheck +1) == null){
            return false;
        }
                else{return false;}

    }
    public boolean DownChecker(int x, int y){
        x = Integer.parseInt(Location.substring(0,1));
        y = Integer.parseInt(Location.substring(2,3));

                int xCheck = x;
                int yCheck = y - 1;
                String xCd = String.valueOf(xCheck);
                String yCd = String.valueOf(yCheck);
                if(yCheck < 0) {return false;}
                else if(maze.get(yCheck).substring(xCheck, xCheck +1).equals(".") || maze.get(yCheck).substring(xCheck,xCheck+1).equals("$")){
                    return true;
        } else if(maze.get(yCheck).substring(xCheck, xCheck +1) == null){
            return false;
        }
                else{return false;}

    }
    public void printer(){
        while(MazePath.peek() != null){
          System.out.println(MazePath.peek());
        }
        MazePath.pop();
    }
    public boolean oldPlace(int x, int y){
        boolean trueornot = false;
        for (y = 0; y< oldPath.size(); y++){

            if(oldPath.get(y).equals(MazePath.peek())){
                trueornot = true;
            }

        }
         if(trueornot == true){
                return true;
            }
            else{
                return false;
            }
    }


}