org.apache.hadoop.io

类 DoubleWritable

java.lang.Object

org.apache.hadoop.io.DoubleWritable

所有已实现的接口:

Comparable, Writable, WritableComparable

public class DoubleWritable
extends Object
implements WritableComparable

Writable for Double values.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	DoubleWritable.Comparator A Comparator optimized for DoubleWritable.

构造器概要

构造器

构造器和说明
DoubleWritable()
DoubleWritable(double value)

方法概要

方法

限定符和类型	方法和说明
int	compareTo(Object o)
boolean	equals(Object o) Returns true iff o is a DoubleWritable with the same value.
double	get()
int	hashCode()
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	set(double value)
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 java.lang.Object

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

构造器详细资料

DoubleWritable

public DoubleWritable()

DoubleWritable

public DoubleWritable(double value)

方法详细资料

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

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

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

set

public void set(double value)

get

public double get()

equals

public boolean equals(Object o)

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

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

compareTo

public int compareTo(Object o)

指定者:

compareTo 在接口中 Comparable

toString

public String toString()

覆盖:

toString 在类中 Object