Java

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package filesudoku;

/**
 *
 * @author ahangari
 */
import java.io.*;
import java.util.*;
import java.lang.Exception;


public class Sudoku {

     public static int[][] matrix;
     public static int counter = 0;
     public static String matrixView;

     public static void main(String[] args)  throws FileNotFoundException{

          System.out.print("Please enter file name: ");
          Scanner in = new Scanner(System.in);
          String fileName = in.next();
          matrixCreate(fileName);

        // TODO code application logic here
    }
 public static void matrixCreate(String fileName) throws FileNotFoundException {

    File getFile = new File(fileName);
    Scanner scan = new Scanner(getFile);
    matrixView = null;

    while (scan.hasNextLine()){
      matrixView = scan.nextLine();//consider each line of input as a string
      counter++;//for counting rows number
      System.out.println(matrixView);// printing in output
    }

    scan.close();

    matrix = new int[counter] [matrixView.length()];//an array for keeping the value of each col and row


    scan = new Scanner(getFile);
    char getCol;
    for (int rows = 0; rows < counter; rows++){
      matrixView = scan.nextLine();
      for (int cols = 0; cols < matrixView.length(); cols++){
        getCol = matrixView.charAt(cols);//
        matrix[rows] [cols] = getCol;//
      }
    }



 
  }

}