public class Database {
    public static void saveStudentsToFile(File file, Student[] students) throws IOException{
        if(file==null || students==null){
            throw new IllegalArgumentException();
        }
        try(ObjectOutput oos = new ObjectOutputStream(new FileOutputStream(file))){
           oos.writeObject(students);
        }catch (IOException e){
            throw e;
        }
    }
    public static Student[] loadStudentsFromFile(File file) throws ClassNotFoundException, IOException{
        if(file == null){
            throw new IllegalArgumentException("NO FILE");
        }
        Student[] students = null;
        try(ObjectInput ois = new ObjectInputStream(new FileInputStream(file))){
             students = (Student[])ois.readObject();
        }catch (IOException e){
            throw e;
        }catch (ClassNotFoundException e){
            throw e;
        }
        return students;
    }
}