Deserialize list of object java -> INVALID STREAM HEADER

Question

I have a simple class Ksiazka and try to serialize and deserialize a list of it. Firstly I need to load it from the file "bibdefaout.txt". I keep getting an error:

Exception in thread "main" java.io.StreamCorruptedException: invalid stream header: 5AB36F64
    at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
    at java.io.ObjectInputStream.<init>(Unknown Source)
    at zadanie.Zadanie.main(Zadanie.java:17)

Please tell me what am I doing wrong:

public class Ksiazka implements Serializable{
    protected String tytul;
    protected String autor;
    protected Integer rok;
    protected boolean wypozyczenie;

    public Ksiazka(String tytul, String autor, Integer rok, boolean wypozyczenie) {
        this.tytul = tytul;
        this.autor = autor;
        this.rok = rok;
        this.wypozyczenie = wypozyczenie;
    }
}

public class Zadanie {
    public static void main(String[] args)
            throws FileNotFoundException,IOException, ClassNotFoundException {
        List<Ksiazka> lista;
        // THE FOLLOWING LINE PRODUCES AN ERROR:
        FileInputStream fin=new FileInputStream("bibdefault.txt");
        ObjectInputStream oin=new ObjectInputStream(fin);
        lista=(List<Ksiazka>)oin.readObject();
        fin.close();
        oin.close();

        try {
            ObjectOutputStream out=new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream("bibloteka.out")));
            out.writeObject(daneLista);
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

From docs.oracle.com/javase/7/docs/api/java/io/… "An ObjectInputStream deserializes primitive data and objects previously written using an ObjectOutputStream." — a9a4k
– a9a4k, Commented May 18, 2015 at 7:19
Have you tried this FileInputStream fin=new FileInputStream(new File("bibdefault.txt")) ? — Rookie007
– Rookie007, Commented May 18, 2015 at 7:27
Also, be aware of a BOM: stackoverflow.com/questions/4897876/reading-utf-8-bom-marker/… — Arthur Eirich
– Arthur Eirich, Commented May 18, 2015 at 7:45

Kayaman · Accepted Answer · 2015-05-18 07:15:00Z

2

The file is written wrong and doesn't contain proper serialized data. It's also not happening on the line you claim, since it can't throw that exception.

answered May 18, 2015 at 7:15

Kayaman

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2 Comments

aczajkow Over a year ago

sorry its the next line ,the one ObjectInputStream oin=new ObjectInputStream(fin); and the file looks like that:Złodziejka książek;Zusak Markus;2014 Sezon burz;Sapkowski Andrzej;2013 Akademia pana Kleksa;Brzechwa Jan;2010 Lśnienie;Stephen King;2011 i can't get what is wrong with it

Kayaman Over a year ago

Serialized data is not text. Read a tutorial about serialization before you continue.

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