try。catch有关问题

// 读取数据    private class readThread extends Thread {        public void run() {            BufferedInputStream inStream = null;            String s = new String();            try {                inStream = new BufferedInputStream(socket.getInputStream());                while (true) {                    byte[] buffer = new byte[1024];                    inStream.read(buffer);                    String str = new String(buffer);                    Log.i("", str.trim());                    s += str.trim();                    Log.i("333333333333333333", s);                }            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } finally {                Message msg = new Message();                Log.i("222222222", s);                msg.obj = s;                msg.what = 1;                LinkDetectedHandler.sendMessage(msg);                s = new String();            }        }    }