MST Hadoop IntWritable

Question

I'm Japanese college student. So,　I may not be able to speak English well.

Now,I study MST,Hadoop. I was referring to this page MST. But, I want to MST in multiple rounds. I want to output each of the edge rather than issue a total edge.

So Line 112-115

String strKey = new String();
strKey += inputKey;
Text outputKey = new Text(strKey);

~~~~~

String strKey = new String();
strKey = Integer.toString(inputKey);
Text outputKey = new Text(strKey);

~~~~~ I want to like this.

However, there are undefined constructor or type mismatch, it does not work.

Could you tell me the improvement?

I think of MST 1 rounds G = (V,E) V=V1∪V2...∪Vk V1 and V2 run the this program.(In parallel,V2 and V3...)

2~multiple rounds Run the program again each result, making MST finally.