f = new File(fileName);
	public void reload() {		try {			File f = new File(fileName);			if (!f.exists()) {				createTree();			}			ObjectInputStream ois = new ObjectInputStream(					new FileInputStream(f));			classInfos = (ClassInfo[]) ois.readObject();			ois.close();		} catch (IOException e) {			e.printStackTrace();		} catch (ClassNotFoundException e) {			e.printStackTrace();		}	}