public static String[][] leesGegevens(String bestandsnaam)throws IOException{
        BufferedReader in = new BufferedReader(new FileReader(bestandsnaam+".txt"));

        int M = Integer.parseInt(in.readLine());
        int N = Integer.parseInt(in.readLine());
        int I = -1;
        int J = -1;
        String[][] mleesin = new String[M][N];

        for (int i = 0; i<M; i++){
            I=I+1;
            for (int j = 0; j<N; j++){
                String C = in.readLine();
                if(C.equals(" "));
                else{
                    J=J+1;
                    mleesin[I][J] = C;
                }

            }

        }return mleesin;
    }