Package org.apache.hadoop.io

Class LongWritable

java.lang.Object

org.apache.hadoop.io.LongWritable

All Implemented Interfaces:

java.lang.Comparable<LongWritable>, Writable, WritableComparable<LongWritable>

@Public
@Stable
public class LongWritable
extends java.lang.Object
implements WritableComparable<LongWritable>

A WritableComparable for longs.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LongWritable.Comparator	A Comparator optimized for LongWritable.
static class	LongWritable.DecreasingComparator	A decreasing Comparator optimized for LongWritable.

Constructor Summary

Constructors

Constructor	Description
LongWritable()
LongWritable(long value)

Method Summary

Modifier and Type	Method	Description
int	compareTo(LongWritable o)	Compares two LongWritables.
boolean	equals(java.lang.Object o)	Returns true iff o is a LongWritable with the same value.
long	get()	Return the value of this LongWritable.
int	hashCode()
void	readFields(java.io.DataInput in)	Deserialize the fields of this object from in.
void	set(long value)	Set the value of this LongWritable.
java.lang.String	toString()
void	write(java.io.DataOutput out)	Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LongWritable

public LongWritable()

LongWritable

public LongWritable(long value)

Method Detail

set

public void set(long value)

Set the value of this LongWritable.

Parameters:

value - value.

get

public long get()

Return the value of this LongWritable.

Returns:

value of this LongWritable.

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

java.io.IOException - any other problem for readFields.

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

java.io.IOException - any other problem for write.

equals

public boolean equals(java.lang.Object o)

Returns true iff o is a LongWritable with the same value.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(LongWritable o)

Compares two LongWritables.

Specified by:

compareTo in interface java.lang.Comparable<LongWritable>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object