[Thang] Student

public class StudentList {

    private ArrayList<Student> students = new ArrayList<Student>();
    private File file;

    private ArrayList<Student> readAll() {
        ArrayList arrStudent = new ArrayList();
        try {
            RandomAccessFile randomAccess = new RandomAccessFile(file, "r");
            String r = "";
            while ((r = file.readLine()) != null) {
                Student std = new Student();
                String[] str = r.split("\\|");
                std.setId(Integer.parseInt(str[0].toString()));
                std.setName(str[1].toString());
                std.setScore(Float.parseFloat(str[2].toString()));
                arrStudent.add(std);
            }
            randomAccess.close();
        } catch (IOException | NumberFormatException ex) {
            System.out.println(ex.getMessage());
        }
        return arrStudent;
    }

    public StudentList() {
          file = new File("D:\\Ass.std");
          students = readAll();
    }

    public StudentList(string directory) {
         file = new File(directory);
         students = readAll();
    }

    public void list() {
        int count = 0;
        for (Student s : std) {
            System.out.println((++count) + ".ID: " + s.getId() + " Name: " + s.getName() + " Score: " + s.getScore());

        }
    }

}