public void Deserialize()
    {
        try
        {
            ObjectInputStream inputStreamBanks = new ObjectInputStream(new FileInputStream("banks.bin"));
            for (int i=0; i<main.arr.size(); ++i)
            {
                Bank b = (Bank)inputStreamBanks.readObject();
                main.arr.add(b);
            }
            inputStreamBanks.close();
            ObjectInputStream inputStreamAccs = new ObjectInputStream(new FileInputStream("accs.bin"));
            for (int i=0; i<main.kontoarr.size();++i)
            {
                Konto k = (Konto)inputStreamAccs.readObject();
                main.kontoarr.add(k);
            }
            inputStreamAccs.close();
        }
        catch (ClassNotFoundException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        catch (FileNotFoundException e)
        {
            System.out.println("dupadupadupa");
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }