I think this should work

    /**
     * Returns a map of Mojang-defined URLs (such as session.minecraft.net) to
     * a boolean of whether they are currently working or not.
     * <p>
     * If an error occurs, null is returned.
     *
     * @return map as specified above
     */
    public Map<String, Boolean> getMcStatus() {
        URL checkUrl;
        try {
            checkUrl = new URL("http://status.mojang.com/check");
        } catch (MalformedURLException impossible) {
            return null;
        }
        InputStreamReader read = null;
        HashMap<String, Boolean> ret = new HashMap<String, Boolean>();
        try {
            Object content = new JSONParser().parse(read = new InputStreamReader(checkUrl.openStream()));
            read.close();
            if (!(content instanceof JSONArray)) {
                // Bad / old format
                return null;
            }
            JSONArray arr = (JSONArray) content;
            for (Object obj : arr) {
                if (obj instanceof JSONObject) {
                    JSONObject jobj = (JSONObject) obj;
                    Map.Entry<?, ?> entry = (Map.Entry<?, ?>) (jobj.entrySet()).iterator().next();
                    Object key = entry.getKey();
                    Object value = entry.getValue();
                    String site = (String) key;
                    boolean val = ((String) value).equalsIgnoreCase("green");
                    ret.put(site, val);
                }
            }
            return ret;
        } catch (ClassCastException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } finally {
            tryClose(read);
        }
        return null;
    }

    private void tryClose(Closeable c) {
        if (c == null)
            return;
        try {
            c.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }