Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package AverageProj; import org.apache.hadoop.io.WritableComparable; import org.apache.hadoop.io.WritableComparator; /** * * @author shruti */ public class YearSymComparator extends WritableComparator { protected YearSymComparator() { super(YearPrice.class, true); } @Override public int compare(WritableComparable w1, WritableComparable w2) { YearPrice cw1 = (YearPrice) w1; YearPrice cw2 = (YearPrice) w2; return (cw1.getYear().compareTo(cw2.getYear())); } }