Serializing multiple objects to a file and retrieving them later

Question

I'm trying to make Students objects once at a time and serialize one at a time to a file, Later I would like to retrieve an object where student first and last name matches.

This is what I have been trying to do

    public static void addtoStudents(String First,String Last) {

        Student student = new Student(First,Last);
        ArrayList<Student> student=new ArrayList<>();

        try {

                FileOutputStream fop=new FileOutputStream("object.ser");
                ObjectOutputStream oos=new ObjectOutputStream(fop);
                student.add(student);
                oos.writeObject(student);

 } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

}

And Here is the retrieval code

public static String[] findSomeone(String First,String Last)
{

    try {

            FileInputStream fis=new FileInputStream("object.ser");
            ObjectInputStream ois=new ObjectInputStream(fis);


            ArrayList<Student> student=new ArrayList<>();
            student=(ArrayList<Student>)ois.readObject();

            for(int i=0;i<student.size();i++){
                student.get(i).getFirstname();
                System.out.println(student.get(i).getFirstname());
            }

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


    return null;
}

Answer 1

I'm trying to make Students objects once at a time and serialize one at a time to a file, Later I would like to retrieve an object where student first and last name matches.

This is what I have been trying to do

    public static void addtoStudents(String First,String Last) {

        Student student = new Student(First,Last);
        ArrayList<Student> student=new ArrayList<>();

        try {

                FileOutputStream fop=new FileOutputStream("object.ser");
                ObjectOutputStream oos=new ObjectOutputStream(fop);
                student.add(student);
                oos.writeObject(student);

 } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

}

And Here is the retrieval code

public static String[] findSomeone(String First,String Last)
{

    try {

            FileInputStream fis=new FileInputStream("object.ser");
            ObjectInputStream ois=new ObjectInputStream(fis);


            ArrayList<Student> student=new ArrayList<>();
            student=(ArrayList<Student>)ois.readObject();

            for(int i=0;i<student.size();i++){
                student.get(i).getFirstname();
                System.out.println(student.get(i).getFirstname());
            }

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


    return null;
}