Zapis działania programu

        setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent we)
            {
                zapisz();
                System.exit(0);
                //lub - jeżeli zamykane jest ostatnie (jedyne) okno programu
                dispose();
            }
        });

          public void zapisz(){
            FileOutputStream fos;
            String text;
            byte barr[];
            text=jTextArea1.getText();
            barr=text.getBytes();
            try{
                fos=new FileOutputStream("NAZWA_PLIKU.txt");
                fos.write(barr);
                fos.close();
            }
            catch(Exception ex){
                System.out.println("Błąd [Error]: "+ex.toString());
            }
         }

      public void wczytaj(){
        FileInputStream fis;
        byte buf[];
        try {
            fis = new FileInputStream("NAZWA_PLIKU.txt");
            buf = new byte[fis.available()];
            fis.read(buf);
            String text;
            text = new String(buf);
            jTextArea1.setText(text);
            fis.close();
        } catch (Exception ex) {
            System.out.println("Błąd [Error]: "+ex.toString());
        }
}

            try
            {
                FileOutputStream f = new FileOutputStream(nameOfFile);
                ObjectOutputStream str = new ObjectOutputStream(f);
                str.writeObject(table.getModel());
                str.flush();
                f.close();
            }
            catch(IOException e)
            {
                JOptionPane.showMessageDialog(lista,e.getMessage(),"Zapisywanie do pliku "+nameOfFile,JOptionPane.INFORMATION_MESSAGE);
            }