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## Uses of Package
org.apache.hadoop.io

Packages that use org.apache.hadoop.io
org.apache.hadoop.conf | Configuration of system parameters.
org.apache.hadoop.fs | An abstract file system API.
org.apache.hadoop.fs.permission |
org.apache.hadoop.io | Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.io.serializer | This package provides a mechanism for using different serialization frameworks in Hadoop.
org.apache.hadoop.mapred |
org.apache.hadoop.mapred.join |
org.apache.hadoop.mapred.lib |
org.apache.hadoop.mapred.lib.aggregate |
org.apache.hadoop.mapred.lib.db |
org.apache.hadoop.mapreduce |
org.apache.hadoop.mapreduce.counters | This package contains the implementations of different types of map-reduce counters.
org.apache.hadoop.mapreduce.lib.aggregate |
org.apache.hadoop.mapreduce.lib.db |
org.apache.hadoop.mapreduce.lib.fieldsel |
org.apache.hadoop.mapreduce.lib.input |
org.apache.hadoop.mapreduce.lib.join |
org.apache.hadoop.mapreduce.lib.map |
org.apache.hadoop.mapreduce.lib.partition |
org.apache.hadoop.mapreduce.lib.reduce |
org.apache.hadoop.mapreduce.security |
org.apache.hadoop.record | (DEPRECATED) Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner.
org.apache.hadoop.record.meta |
org.apache.hadoop.security.token |
org.apache.hadoop.security.token.delegation |
org.apache.hadoop.util | Common utilities.
org.apache.hadoop.util.bloom |
org.apache.hadoop.yarn.security.client |

Classes in org.apache.hadoop.io used by org.apache.hadoop.conf
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs.permission
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io
AbstractMapWritable Abstract base class for MapWritable and SortedMapWritable Unlike org.apache.nutch.crawl.MapWritable, this class allows creation of MapWritable<Writable, MapWritable> so the CLASS_TO_ID and ID_TO_CLASS maps travel with the class instead of being static.
BinaryComparable Interface supported by `WritableComparable` types supporting ordering/permutation by a representative set of bytes.
BooleanWritable A WritableComparable for booleans.
BytesWritable A byte sequence that is usable as a key or value.
ByteWritable A WritableComparable for a single byte.
DoubleWritable Writable for Double values.
FloatWritable A WritableComparable for floats.
IntWritable A WritableComparable for ints.
LongWritable A WritableComparable for longs.
MapFile A file-based map from keys to values.
MapWritable A Writable Map.
MD5Hash A Writable for MD5 hash values.
NullWritable Singleton Writable with no data.
ObjectWritable A polymorphic Writable that writes an instance with it's class name.
RawComparator A `Comparator` that operates directly on byte representations of objects.
ShortWritable A WritableComparable for shorts.
SortedMapWritable A Writable SortedMap.
Stringifier Stringifier interface offers two methods to convert an object to a string representation and restore the object given its string representation.
Text This class stores text using standard UTF8 encoding.
VIntWritable A WritableComparable for integer values stored in variable-length format.
VLongWritable A WritableComparable for longs in a variable-length format.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.
WritableComparator A Comparator for `WritableComparable`s.
WritableFactory A factory for a class of Writable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io.serializer
RawComparator A `Comparator` that operates directly on byte representations of objects.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred
BytesWritable A byte sequence that is usable as a key or value.
Closeable Deprecated. use java.io.Closeable
LongWritable A WritableComparable for longs.
RawComparator A `Comparator` that operates directly on byte representations of objects.
Text This class stores text using standard UTF8 encoding.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.join
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.
WritableComparator A Comparator for `WritableComparable`s.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib
Closeable Deprecated. use java.io.Closeable
LongWritable A WritableComparable for longs.
Text This class stores text using standard UTF8 encoding.
WritableComparable A `Writable` which is also `Comparable`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.aggregate
Closeable Deprecated. use java.io.Closeable
Text This class stores text using standard UTF8 encoding.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.db
LongWritable A WritableComparable for longs.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce
RawComparator A `Comparator` that operates directly on byte representations of objects.
Text This class stores text using standard UTF8 encoding.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.counters
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.aggregate
Text This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.db
LongWritable A WritableComparable for longs.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.fieldsel
Text This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.input
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.join
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparator A Comparator for `WritableComparable`s.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.map
Text This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.partition
BinaryComparable Interface supported by `WritableComparable` types supporting ordering/permutation by a representative set of bytes.
RawComparator A `Comparator` that operates directly on byte representations of objects.
WritableComparator A Comparator for `WritableComparable`s.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.reduce
IntWritable A WritableComparable for ints.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.security
Text This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.record
RawComparator A `Comparator` that operates directly on byte representations of objects.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.
WritableComparator A Comparator for `WritableComparable`s.

Classes in org.apache.hadoop.io used by org.apache.hadoop.record.meta
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.
WritableComparable A `Writable` which is also `Comparable`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token.delegation
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util.bloom
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.security.client
Text This class stores text using standard UTF8 encoding.
Writable A serializable object which implements a simple, efficient, serialization protocol, based on `DataInput` and `DataOutput`.

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