final List<Map<String,String>>  jsonData = new ArrayList<>();

   DataFrame df =  sqlContext.read().json("file:///home/dev/data-json/emp.json");
   JavaRDD<String> rdd = df.toJSON().toJavaRDD();

   rdd.foreach(new VoidFunction<String>() {
       @Override
       public void call(String line)  {
           try {
               System.out.println(line);
               jsonData.add (new ObjectMapper().readValue(line, Map.class));
           } catch (IOException e) {
               e.printStackTrace();
           }
       }
   });


   System.out.println(jsonData.size());

{"address":"noida","name":"karthik","occupation":"engg","salary":20000}
{"address":"noida","name":"dev","occupation":"engg","salary":10000}

 -----other 98 records

TypeReference<HashMap<String,String>> typeRef
            = new TypeReference<HashMap<String,String>>() {};

jsonData.add (new ObjectMapper().readValue(line, typeRef));