Serializacaja danych problem z odczytem

 String fileName = "person.obj";
FileOutputStream fs = new FileOutputStream(fileName, true);
                ObjectOutputStream os = new ObjectOutputStream(fs);
 List<Person> per = new ArrayList<>();
os.writeObject(new Person("JAGODA ","BRONSKA"));

 FileInputStream fis = new FileInputStream(fileName);
                ObjectInputStream ois = new ObjectInputStream(fis);
  List<Person> pera = (List<Person>)ois.readObject();
for (Person el: pera){
    System.out.println(el.getFirstName()+" "+el.getLastName());
}

List<Person> per = new ArrayList<>();
os.writeObject(new Person("JAGODA ","BRONSKA"));

List<Person> per = new ArrayList<>();
per.add(new Person("JAGODA ","BRONSKA"));
os.writeObject(per);

package com.company;

import java.io.Serializable;

public class Person implements Serializable {
     private static final long serialVersionUID = 3812017177088226528L;
    private String firstName;
    private String lastName;

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Person(){}

    public Person(String firstName, String lastName) {
        setFirstName(firstName);
        setLastName(lastName);
    }

    public String toString() {
        return firstName + " " + lastName;
    }

}

package com.company;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        Person person = new Person();
        String fileName = "person.obj";

        FileOutputStream fs = new FileOutputStream(fileName,true);
       ObjectOutputStream os = new ObjectOutputStream(fs);

        List<Person> per = new ArrayList<>();
       per.add(new Person("Jurek", "Nowak"));
        per.add(new Person("Wacek ", "Zielonka"));
       os.writeObject(per);
 os.flush();
        os.close();

        System.out.println("Zapisano obiekt do pliku");

        // ODczyt danych z pliku ///////////////////////////////



        FileInputStream fis = new FileInputStream(fileName);
        ObjectInputStream ois = new ObjectInputStream(fis);


        List<Person> pera = (List<Person>) ois.readObject();


       
        for (Person el : pera) {
            System.out.println(el.getFirstName() + " " + el.getLastName());
            ois.close();
        }


       

    }

}

¬í sr java.util.ArrayListxÒ™Ça I sizexp   w   sr com.company.Person4çlöôà L 	firstNamet Ljava/lang/String;L lastNameq ~ xpt Jurekt Nowaksq ~ t Wacek t Zielonkax¬í sr java.util.ArrayListxÒ™Ça I sizexp   w   sr com.company.Person4çlöôà L 	firstNamet Ljava/lang/String;L lastNameq ~ xpt Mirekt kaziuksq ~ t Aga t 	kruszonkax

FileInputStream fis = new FileInputStream("outputFile");
ArrayList<Object> objectsList = new ArrayList<Object>();
boolean cont = true;
try{
   ObjectInputStream input = new ObjectInputStream(fis);
   while(cont){
      Object obj = input.readObject();
      if(obj != null)
         objectsList.add(obj);
      else
         cont = false;
   }
}catch(Exception e){
   //System.out.println(e.printStackTrace());
}

Object obj = input.readObject();

for (Object el : objectsList) {
            System.out.println(el.toString());

        }

package com.company;

import java.io.*;
import java.util.ArrayList;


public class Main {

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        Person person = new Person();
        String fileName = "person.obj";

        FileOutputStream fs = new FileOutputStream(fileName, true);
        ObjectOutputStream os = new ObjectOutputStream(fs);

        os.writeObject(new Person("Gargamel", "benek"));
        os.writeObject(new Person("Franek", "Paluszka"));
        os.close();

        System.out.println("Zapisano obiekt do pliku");

        // ODczyt danych z pliku ///////////////////////////////

        FileInputStream fis = new FileInputStream("person.obj");
        ArrayList<Object> objectsList = new ArrayList<Object>();
        boolean cont = true;
        try {
            ObjectInputStream input = new ObjectInputStream(fis);
            while (cont) {
                Object obj = input.readObject();
                if (obj != null)
                    objectsList.add(obj);
                else
                    cont = false;
            }
        } catch (Exception e) {
            //System.out.println(e.printStackTrace());
        }
        for (Object el : objectsList) {
            System.out.println(el.toString());

        }

    }

}

public static void main(String[] args) throws IOException, ClassNotFoundException {
        String fileName = "person.obj";
        Path path= Paths.get(fileName);
        
        ObjectOutputStream os;
        if(!Files.exists(path)) {
        	os = new ObjectOutputStream(new FileOutputStream(fileName));
        }
        else {
        	os = new ObjectOutputStream(new FileOutputStream(fileName, true)) {
        		protected void writeStreamHeader() throws IOException {
                    reset();
                }
        	};
        }
 
        os.writeObject(new Person("Gargamel", "benek"));
        os.writeObject(new Person("Franek", "Paluszka"));
        os.close();
 
        System.out.println("Zapisano obiekt do pliku");
 
        // ODczyt danych z pliku ///////////////////////////////
 
        FileInputStream fis = new FileInputStream("person.obj");
        ArrayList<Object> objectsList = new ArrayList<Object>();
        boolean cont = true;
        try {
			ObjectInputStream input = new ObjectInputStream(fis);
            while (cont) {
                Object obj = input.readObject();
                if (obj != null)
                    objectsList.add(obj);
                else
                    cont = false;
            }
        } catch (EOFException e) {
//            e.printStackTrace(); //tego wyjątku niekoniecznie chcemy printowac
        }
        for (Object el : objectsList) {
            System.out.println(el.toString());
 
        }
 
    }

tableViewPerson.getItems().addAll(objectsList);

@FXML
    private TableView<Object> tableViewPerson;