dd

public Object getBinarySearchTree() {
        File f = new File(DEFAULT_MAPS_DIRECTORY_PATH + "/binfiles/cz/czbst1.bin");
        BufferedInputStream b = null;
        ObjectInputStream reader = null;
        try {
            b = new BufferedInputStream(new FileInputStream(f));
            reader = new ObjectInputStream(b);
            Object o = reader.readObject();
            return o;
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        finally {
            try {
                b.close();
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }