Set on reducer issue

[Thamizhannal Paramasivam]

Hi,
I require clarification on using IntWritable in Set type in Java.
Below is my sample code. When I execute reducer with E.x. key="abcd"
values=12,3,4, then categorySet have any one value from values.

My hadoop version is 0.20.2. Any help would be appreciated.

        public void reduce(Text key, Iterable<IntWritable> values,
                Context context) throws IOException, InterruptedException {

             Set<IntWritable> categorySet = new TreeSet<IntWritable>();
             for (IntWritable val : values) {
                 categorySet.add(val);
             }
            ----------------
            ----------------
    }

Thanks,
Thamizh