How to restore and save melodi from/into file

BeatBox.java

    /**
     * Restore a melody from the file
     */
    private class RestoreMelodiListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent a) {
            boolean[] checkboxState = null;
            try {
                JFileChooser fin = new JFileChooser();
                fin.showOpenDialog(theFrame);

                File selectedFile = fin.getSelectedFile();

                ObjectInputStream ois = new ObjectInputStream(new FileInputStream(selectedFile));
                checkboxState = (boolean[]) ois.readObject();
            } catch (Exception e) {
                e.printStackTrace();
            }
            for (JCheckBox check : checkboxList) {
                check.setSelected(check.isSelected());
            }
            for (int i = 0; i < 256; i++) {
                JCheckBox check = checkboxList.get(i);
                check.setSelected(checkboxState != null && checkboxState[i]);
            }
            sequencer.stop();
            buildTrackAndStart();
        }
    }

    /**
     * Save ringtone to file
     */
    private class SaveMelodiListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent a) {
            boolean[] checkboxState = new boolean[256];
            for (int i = 0; i < 256; i++) {
                JCheckBox check = checkboxList.get(i);
                if (check.isSelected()) {
                    checkboxState[i] = true;
                }
            }
            try {
                JFileChooser fin = new JFileChooser();
                fin.showOpenDialog(theFrame);

                File selectedFile = fin.getSelectedFile();

                if (selectedFile != null) {
                    FileOutputStream fileStream = new FileOutputStream(selectedFile);
                    ObjectOutputStream os = new ObjectOutputStream(fileStream);
                    os.writeObject(checkboxState);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }