How to perform Sort JavaPairRDD in apache spark

I am fetching Ip addresses from a log file and performing count on it,now i want to sort that JavaPairRDD based on its count value. you can refer below code.

JavaPairRDD<String, Integer> counts = pairs.reduceByKey(new Function2<Integer, Integer, Integer>() {

        @Override
        public Integer call(Integer v1, Integer v2) throws Exception {
            // TODO Auto-generated method stub
            return v1 + v2;
        }
    });

the above JavaPairRDD will return IP count and now i want to sort it.. for eg output will be like this

(172.16.0.0,125)
(192.168.0.0,12)
(127.168.0.44,92)

2nd value is count of that particular ip.