private static Icon _addIcon(String path) {
		File file = new File(path);
		Icon icon = icons.get(file.getName());
		if (icon != null)
			return icon;
		if (!file.exists())
			return null;
		try {
			icon = new ImageIcon(file.getAbsolutePath());
		} catch (Exception e) {
			e.printStackTrace();
		}
		if (icon != null)
			icons.put(file.getName(), icon);
		return icon;
	}