Strumienie tekstowe (BufferedReader)

    public static void licz(File f)throws IOException{
        ArrayList<Abs> al = new ArrayList<>();
        char znak = 'a';
        while(znak<='z'){
            int count=0;
            String linia;
            BufferedReader br = new BufferedReader(new FileReader(f));
            while((linia=br.readLine())!=null){
                for(int i=0; i<linia.length(); i++){
                    if(linia.charAt(i)==znak)count++;
                }
            }
            Abs obj = new Abs(znak,count);
            al.add(obj);
            znak++;
        }

 BufferedReader br = new BufferedReader(new FileReader(f));