javajava

static void blockedClient()
    {
        try {
            List<Klient> list = new ArrayList<Klient>();

            File file = new File("uzytkownicy.txt");
            Scanner input = null;

            try {
                input = new Scanner(file);

                String line;

                while(input.hasNext())
                {
                    line = input.next();

                    if(line.equals("ID:"))
                    {
                        if(input.hasNextInt())
                        {
                            klient.ID = input.nextInt();
                        }
                    }
                    if(line.equals("Imię:"))
                    {
                        klient.imie = input.next();
                    }
                    if(line.equals("Nazwisko:"))
                    {
                        klient.nazwisko = input.next();
                    }
                    if(line.equals("Rok_urodzenia:"))
                    {
                        if(input.hasNextInt())
                        {
                            klient.rok_urodzenia = input.nextInt();
                        }
                    }
                    if(line.equals("Płeć:"))
                    {
                        klient.plec = input.next();
                    }
                    if(line.equals("PIN:"))
                    {
                        if(input.hasNextInt())
                        {
                            klient.PIN = input.nextInt();
                        }
                    }
                    if(line.equals("Hasło:"))
                    {
                        klient.haslo = input.next();
                    }
                    if(line.equals("Pytanie_pomocnicze:"))
                    {
                        klient.pytanie_pomocnicze = input.next();
                    }
                    if(line.equals("Odpowiedz:"))
                    {
                        klient.odpowiedz = input.next();
                    }
                    if(line.equals("Stan_konta:"))
                    {
                        if(input.hasNextInt())
                        {
                            klient.stan_konta = input.nextInt();

                            list.add(klient);
                        }
                    }
                }

                for(Klient objectKlient : list)
                {
                    System.out.println("");
                    System.out.println("ID: " + objectKlient.ID);
                    System.out.println("Name: " +  objectKlient.imie);
                    System.out.println("Last name: " +  objectKlient.nazwisko);
                    System.out.println("Year of birth: " +  objectKlient.rok_urodzenia);
                    System.out.println("Sex: " +  objectKlient.plec);
                    System.out.println("PIN: " +  objectKlient.PIN);
                    System.out.println("password: " +  objectKlient.haslo);
                    System.out.println("Leading Qestion: " +  objectKlient.pytanie_pomocnicze);
                    System.out.println("Answer: " +  objectKlient.odpowiedz);
                    System.out.println("Account balance: " +  objectKlient.stan_konta);
                    System.out.println("");
                }

                int count = 0;
                FileWriter fileWriter = new FileWriter("blockedList.txt");
                BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

                String choose;

                while(true)
                {
                    System.out.println("");
                    System.out.println("");
                    System.out.print("Enter the number of accounts do block ( 0 - back): ");

                    Scanner input2 = new Scanner(System.in);
                    choose = input2.nextLine();

                    if(choose.equals("0"))
                        break;

                    char[] char_choose = choose.toCharArray();

                    for(int i = 0 ; i < choose.length(); ++i)
                    {
                        if(LogowanieRejestracja.isInt(char_choose[i]))
                            count++;
                    }

                    if(count != choose.length())
                    {
                        System.out.println("");
                        System.out.println("");
                        System.out.print("You must enter the number!");
                        Thread.sleep(2000);

                        continue;
                    }
                    else if(Integer.parseInt(choose) < 1 || Integer.parseInt(choose) > list.size())
                    {
                        System.out.println("");
                        System.out.println("");
                        System.out.print("You have entered the wrong number!");
                        Thread.sleep(2000);

                        continue;
                    }
                    else
                    {

                    }

                }
            } catch (FileNotFoundException e) {
                System.out.println();
                System.out.println();
                System.out.print("You can not open the file.");
            }


        } catch (IOException | InterruptedException e) {
            System.out.println("");
            System.out.println("");
            System.out.println("ERROR!");
        }
    }