com.aliyun.odps.io

Class FloatWritable

java.lang.Object

com.aliyun.odps.io.FloatWritable

All Implemented Interfaces:

Writable, WritableComparable<FloatWritable>, Comparable<FloatWritable>

public class FloatWritable
extends Object
implements WritableComparable<FloatWritable>

FloatWritable 提供了 float 的 Writable 和 WritableComparable 的实现

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FloatWritable.Comparator FloatWritable 对象的 WritableComparator 自然顺序实现（升序）.

Constructor Summary

Constructors

Constructor and Description
FloatWritable() 默认构造 float 值为0.0的 FloatWritable.
FloatWritable(float value) 构造 float 值为给定 value 的 FloatWritable.

Method Summary

Modifier and Type	Method and Description
int	compareTo(FloatWritable o) 比较两个 FloatWritable 的值.
boolean	equals(Object o) 判断两个 FloatWritable 是否相等.
float	get() 返回此 FloatWritable 的值
int	hashCode() 计算哈希值，直接返回(int) Float.floatToIntBits
void	readFields(DataInput in) 从指定的 DataInput in 反序列化.
void	set(float value) 设置 FloatWritable 的值
String	toString()
void	write(DataOutput out) 序列化到指定的 DataOutput out.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FloatWritable

public FloatWritable()

默认构造 float 值为0.0的 FloatWritable.

FloatWritable

public FloatWritable(float value)

构造 float 值为给定 value 的 FloatWritable.

Parameters:

value -

Method Detail

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

从指定的 DataInput in 反序列化.

Specified by:

readFields in interface Writable

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

序列化到指定的 DataOutput out.

Specified by:

write in interface Writable

Throws:

IOException

set

public void set(float value)

设置 FloatWritable 的值

Parameters:

value -

get

public float get()

返回此 FloatWritable 的值

Returns:

equals

public boolean equals(Object o)

判断两个 FloatWritable 是否相等.

如果两个都是 FloatWritable 且值相等，返回true，否则返回false

Overrides:

equals in class Object

Parameters:

o -

Returns:

hashCode

public int hashCode()

计算哈希值，直接返回(int) Float.floatToIntBits

Overrides:

hashCode in class Object

compareTo

public int compareTo(FloatWritable o)

比较两个 FloatWritable 的值.

Specified by:

compareTo in interface Comparable<FloatWritable>

Parameters:

o - 比较对象

Returns:

(this < o ? -1 : (this == o) ? 0 ：1))

toString

public String toString()

Overrides:

toString in class Object