类分层结构
- java.lang.Object
- org.apache.hadoop.mapreduce.lib.fieldsel.FieldSelectionHelper
- org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
- org.apache.hadoop.mapreduce.Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
Copyright © 2009 The Apache Software Foundation