writeObject

        Vector  vec = new Vector(5);
        vec.addElement(6);
        vec.addElement(8);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(vec);
        oos.close();
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());


        PreparedStatement stm = mydb.conn.prepareStatement("insert into projects values(?, ?);");
        stm.setInt(1, 1);
        stm.setBinaryStream(2, bais);
        stm.executeUpdate();