问catch语句之前的Return语句

EN

@Override
    protected Boolean doInBackground(String... userandpass)  { //I still get an error telling me to add a return statement
        // TODO Auto-generated method stub
        URL url;
        try {
            url = new URL("http://127.0.0.1:1337");
            HttpURLConnection URLconnection = (HttpURLConnection) url.openConnection();
            URLconnection.setDoOutput(true);
            URLconnection.setChunkedStreamingMode(0);

            //output stream
            OutputStream out = new BufferedOutputStream(URLconnection.getOutputStream());
            writestream(out, userandpass);

            //buffered server response
            InputStream in = new BufferedInputStream(URLconnection.getInputStream());
            String result = readstream(in);
            Log.e(result, result);

            // check we haven't been redirected (Hotel Wifi, for example).
            checkrediect(URLconnection, url);

            Boolean result_true = checkresult(result);

            if(result_true) {
                return true;  
            } else {
                return false;
            }



        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }