JAVA vraagje

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

class Field{

     /*  void drawLine(  ) {
        String s = "+";
        for (int i=1; i<cells[0].length-1; i++) { s+="--"; }
        s += "+";
        System.out.println(s);
    }

    public void print() {
        drawLine();
        for (int i = 1; i < cells.length-1; i++) {
            System.out.print("|");
            for (int j = 1; j < cells[i].length-1; j++) {
                System.out.print( cells[i][j].draw() );
                System.out.print( " " ); // to get a more square-like output
            }
            System.out.println("|");
        }
        drawLine();
    }

    int numNeighbours(){} //This method calculates the number of living neighbours of a cell with coördinates i,j
    */


    public void calcNew(){  //This method calculates the new generation
   GameOfLife.fieldarray();

   char c = firstfield[0][0];
   System.out.println(c);
    }

}

/*class Cell{

  boolean alive; //This variable describes the state of a cell

  boolean isAlive(){ //This method returns the state of a cell

  }

  String draw()} //This method returns the cell as a character to be printed

}

  void setAlive(boolean state){} //This method changees the state of a cell

  }*/

public class GameOfLife{ //Main class
     File source;
     Scanner sc = new Scanner(System.in);
     char firstfield[][]; //This is going to be our array where we store the first generation
     int height; int width; //We obtain these values from the input file
     String s; //This string is used for filling the array with the first generation


      public char[][] readInitial(String filename){ //This method returns an array with the first generation

       try {
             source = new File(filename); //Declares the source
             Scanner sf = new Scanner(source); //Initialises the scanner
             height = sf.nextInt(); //Reads the height and width from the input file
             width = sf.nextInt();
             firstfield = new char[height+2][width+2]; //Creates an array with heigth + 2 rows and width+2 columns
             char dot = '.' ; //This is used to create the border.


             for(int i = 0; i < width+2; i++){ //This for-loop creates the horizontal border of the field.
               firstfield[0][i] = dot;
               firstfield[height+1][i] = dot;
             }

             for(int j = 0; j < height+2; j++){ //These for-loop creates the vertical border of the field.
               firstfield[j][0] = dot;
               firstfield[j][width+1] = dot;
             }


             for(int j = 1; j < height + 2; j++){ //These 2 loops fill the array with the first generation

               if(sf.hasNext()){

                 String s = sf.next();
                 for(int i = 1; i < width + 1 ; i++){

                   char c = s.charAt(i-1);
                   firstfield[j][i] = c;}

               }

               else{
               }

             }
             }  catch(FileNotFoundException e) { //This handles possible errors
            System.out.println("The file "+filename+" could not be found");
              }

             sc.close();

             return firstfield;
        }

   public Array fieldarray(){

        return firstfield[][];

      }

      void play(){

       System.out.println("Give number of desired generations please");
       int numberofgen = 10; //int numberofgen = sc.nextInt();
       System.out.println("Give the name of the file please");
       String filename = "first.txt" ; //String filename = sc.next();
       readInitial(filename); //This executes the method which initialises the first generation from the input

       Field.calcNew();



    // for(int i = 1; i < numberofgen+1; i++){
      //try{Thread.sleep(2000);}catch{InterruptedException e){} //This pauses the programm for 2 seconds
     //  }
    public static void main(String[] args) {
      new GameOfLife().play();}


    }