Последний пункт.

public static void main(String[] args) {
        PersonScannerAdapter personScannerAdapter =
                new PersonScannerAdapter(new Scanner(System.in));
    }

    public static class PersonScannerAdapter implements PersonScanner{
  private  Scanner fileScanner;
  PersonScannerAdapter (Scanner fileScanner){
      this.fileScanner = fileScanner;
  }

        @Override
        public Person read() throws IOException, ParseException {
            String userNameString = fileScanner.nextLine();
          BufferedReader bufferedReader = new BufferedReader(new FileReader(userNameString));

            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd MM yyyy", Locale.ENGLISH);
            int index=0;
            while (bufferedReader.ready())
                 index = bufferedReader.readLine().indexOf("\\d");
            String [] string = userNameString.split(" ");

            Person person = new Person(string[0]
                                      ,string[1]
                                      ,string[2]
                                      ,
 simpleDateFormat.parse(userNameString.substring
                 (index,userNameString.length()).toString())
                    );

      return person;
        }

        @Override
        public void close() throws IOException {
           this.fileScanner.close();
        }
    }
}

..."file.txt"...