fileloader.java

Asimple maze game that you can create and run maze

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class FileLoader
{
    public void loadFile(String fileName)
    {  
        try
        {
            BufferedReader in = new BufferedReader(new FileReader(fileName));            
            String x;
            int lineNum=0;
            while (( x = in.readLine()) != null) 
            { 
                MatrixLoader(x,lineNum);//pass the Matrix loader method the line and the line number for parsing.
                lineNum++;//we will use the line number later in this class
            }
         }//end try
        catch (IOException e) 
        {  
            JFrame frame = new JFrame("Alert");
            JOptionPane.showMessageDialog(frame, "Ooops IOException error, i did it again!" + e.getMessage());
        }//end catch
     }//end load file method
     
     public void MatrixLoader(String fileTextLine, int lineNum)throws gameFileError
     {
        // exitCount=0;//we must reset our variables to zero for the next level.              
        
         int sum=0;
         char textVar;
         if(lineNum == 0)//it is the first line of the maze file, create The Matrix based on first line of the maze file
         { 
             for(int i=0; i<fileTextLine.length();i++)
             {
                 if(fileTextLine.charAt(i) ==' ')//find blank area on first line number
                 sum+=1;//how many blank spaces between the size of the matrix aka 4 6 or 5  7
             } 
             int locationOfSpace = fileTextLine.indexOf(" ");//still handling that possible blank space in the matrix size in the file
             String c1=fileTextLine.substring(0,locationOfSpace);//see above
             String r1=fileTextLine.substring(locationOfSpace+sum,fileTextLine.length());//see above
             column = Integer.parseInt(c1);
             row = Integer.parseInt(r1);
             GameMatrix=new String[row][column];//create new matrix based on the size from the file       
          }//end if 
          else
             for(int i=0; i< fileTextLine.length();i++)//it is not the first line of the maze file
             {
                 textVar = fileTextLine.charAt(i); //grab the individual charaters from the string.
                 if(textVar == '.')//change . to N, so we dont have any goofy file system problems
                    textVar='N';
                 String textVar1= "" + textVar;
                 if(textVar == 'E')//log the position of the exit for later use
                 {
                  
                     exitXCord = lineNum-1;
                     exitYCord =i;
                    // textVar='W';
                     textVar1= "" + textVar;//turn the exit into a wall
                 }
                      GameMatrix[lineNum-1][i]=textVar1; //load the matrix with values, aka N,W, D, H, etc
               }//end for loop
               
        
     }//end matrixloader method
     
     public String[][] getGameMatrix()
     { int exitCount=0;
         int i1=0;
         int j1=0;
          //  playerCount=0;//we must reset our variables to zero for the next level.
          //before we will return the matrix we will quick do some error checking
                       int playerCount=0;
        for (int i = 0; i < GameMatrix.length; i++) {
            for (int j = 0; j < GameMatrix[i].length; j++) {
                if(GameMatrix[i][j].equals("P"))
                {                   playerCount+=1;
                  
                }
                else if(GameMatrix[i][j].equals("E"))
                {
                  exitCount+=1;   
                  i1=i;
                  j1=j;
                }
     System.out.println(playerCount + "playerCount");
        System.out.println(exitCount + "playerCount");

          }}//end double for loop
             if(playerCount >1 || exitCount>1)
             {
                // playerCount=0;//we must reset our variables to zero for the next level.
                // exitCount=0;//we must reset our variables to zero for the next level.
                 throw new gameFileError();
             }
             else
             GameMatrix[i1][j1]="W";
             

         
         return GameMatrix;
     }//end getGameMatrix method
     
     public int getMatrixSizeColumn()//return the matrixsize-column
     {
         return column;
     }
     
     public int getMatrixSizeRow()//return the matrix size-row
     {
         return row;
         
     }
     
   public int ExitXCord() //return the X cordinates for the Exit
   {
      return exitXCord;
   }
   
   public int ExitYCord()//return the Y cordinates for the Exit
   {
      return exitYCord; 
   }
   
   public int dimondCount()
   {
       int totalDimonds=0;
        for (int i = 0; i < GameMatrix.length; i++){
            for(int j = 0; j < GameMatrix[i].length; j++){
            if(GameMatrix[i][j].equals("D") || GameMatrix[i][j].equals("H"))
                totalDimonds+=1;
        }}//end double for loop
     return totalDimonds;//return the total number of dimonds in the level
    }
    
    private class gameFileError extends RuntimeException //if a level is loaded with ether two players or two exits throw this
    {
        public gameFileError()
        {
            JFrame frame = new JFrame("Alert");
            JOptionPane.showMessageDialog(frame, "Your maze file ether had more than one player, or more than one exit.");
         }
    }//end inner class
    
private int exitXCord=0;
private int exitYCord=0;;
private String[][] GameMatrix;
private int column;
private int row;

}//end class