File encoding error after serialization

[minor berry]

The main idea of the program is that it retrieves a list of objects from a file and add a new element to that list

[carmine nacelle]

<@&987246399047479336> please have a look, thanks.

[carmine nacelle]

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[minor berry]

public class UserService {
    private UserView userView;
    private List<Student> studentList = new ArrayList<>();

    public UserService(UserView userView) {
        this.userView = userView;
    }

    public void addNewStudentToList() {
        Student student = userView.readStudentInformations();
        retrieveListOfStudents();
        studentList.add(student);
        addToList();
    }

    public void addToList() {
        try {
            FileOutputStream fout= new FileOutputStream ("test.ser");
            ObjectOutputStream oos = new ObjectOutputStream(fout);
            oos.writeObject(studentList);
            fout.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void retrieveListOfStudents() {
        try {
            FileInputStream fin= new FileInputStream ("test.ser");
            ObjectInputStream ois = new ObjectInputStream(fin);
            studentList = (ArrayList<Student>)ois.readObject();
            fin.close();

            studentList.forEach(System.out::println);

        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

}  

[carmine nacelle]

Detected code, here are some useful tools:

[iron rampart]

@minor berry what's the problem?

[minor berry]

how can I modify this to a normal text

[minor berry]

this is the output I get

[iron rampart]

This is not supposed to be normal text

[minor berry]

I know

[iron rampart]

What you are asking is like "how to convert png to normal text"

[minor berry]

yes

even if I switch to another encoding format results the same

[iron rampart]

Yes that's normal

What do you think opening a png as text and trying to change encoding will do

I don't understand what you are trying to do here

@minor berry

[minor berry]

I'm trying to add a new element to a list that I retrieve from that test2.ser file

[iron rampart]

Then add it

list.add

[minor berry]

I did it, it works

but I was hoping to get a human-readable file in test.ser

[iron rampart]

Well no

[minor berry]

for ex to see each student on a new row

[iron rampart]

That's not the goal of java default serialization mechanism

[minor berry]

oh

is there a way to achieve what I want?

[iron rampart]

If you want human readable format, use a lib like Jackson and serialize as json

[minor berry]

aha got it

thanks for your help, I will try this way