Java IO Binario

import java.io.*;


public class Main {

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        byte b[] = {00,00,00,12};
        File file = new File("Integer.dat");
        FileOutputStream fos = new FileOutputStream(file);

        //YourClass object = (YourClass) ois.readObject();
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeInt(01);oos.writeInt(02);oos.writeObject("Ciao");
        oos.write( b);
        oos.flush();oos.close();
        /*------------------*/
        FileInputStream fis = new FileInputStream(file);
        ObjectInputStream ois = new ObjectInputStream(fis);
        System.out.println(ois.readInt());
        System.out.println(ois.readInt());
        String s = (String) ois.readObject();
        System.out.println(s);
        ois.read(b);
        for (byte by:b)
         System.out.print(by+" ");
        System.out.println();
        oos.close();

    }
}