# Hierarchy For Package org.apache.hadoop.mapreduce.lib.reduce

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.hadoop.mapreduce.Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
    - org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer<Key>
    - org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer<KEY>
    - org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
  - org.apache.hadoop.mapreduce.Reducer.Context (implements org.apache.hadoop.mapreduce.ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>)
    - org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer.Context

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